Cytologie thyroïdienne (Image) Flashcards

1
Q
A

Non-diagnostic/Insatisfaisant

Sang et rares lymphocytes

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2
Q
A

Non-diagnostic/Insatisfaisant

Artéfacts de séchage extensifs

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3
Q
A

Non-diagnostic/Insatisfaisant

Contenu kystique seulement: nombreux macrophages et hémosidérophages sans cellules folliculaires

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4
Q
A

Non-diagnostic/Insatisfaisant

Macrophages avec hémosidérine

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5
Q
A

Non-diagnostic/Insatisfaisant

Le sang cache tout

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6
Q
A

Non-diagnostic/Insatisfaisant

Cellules ciliées respiratoires

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7
Q
A

Bénin - Nodule colloïde

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8
Q
A

Non-diagnostic/Insatisfaisant

Contaminant

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9
Q
A

Bénin

Feuillets de petites cellules à noyau rond

Espacement régulier, nid d’abeilles

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10
Q
A

Bénin

Macrofollicules formant des sphères

Feuillets régulièrement espacés

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11
Q
A

Bénin

Nodule colloïde

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12
Q
A

Bénin

Nodule colloïde

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13
Q
A

Bénin

Diff-Quik-stained smear of an adenomatous nodule shows follicles of varying sizes, watery colloid, blood, and scant, dense colloid (black solid arrow).

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14
Q
A

Bénin

Diff-Quik-stained smear shows abundant watery colloid in an adenomatous nodule. Sometimes colloid cracks in geometric pattern and falls off the slide.

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15
Q
A

Bénin

Pap: evenly spaced cells with a honeycomb pattern. Variation in nuclear size is common in adenomatous nodule. There is no nuclear irregularity or overlap.

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16
Q
A

Bénin

Nodule folliculaire bénin

Cytoplasme délicat avec bordures mal définies

Noyaux de la taille d’une hématie

Parfois, pigment d’hémosidérine

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17
Q
A

Bénin

Nodule folliculaire bénin

Noyaux à chromatine granulaire et nucléole absent ou discret

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18
Q
A

Bénin

Nodule folliculaire bénin

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19
Q
A

Bénin

Cellules de revêtement kystique: cellules pâles au noyau incisuré avec une architecture type “culture tissulaire”.

Parfois atypiques (noyaux élargis) mais membrane nucléaire reste lisse et régulière, chromatine fine et au plus un petit nucléole.

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20
Q
A

Bénin

Symplastic/repair-like reactive changes seen on Diff-Quik characterized by a streaming pattern and spindling of cells with cytoplasmic tails (black solid arrow) are shown. The nuclei are regular with smooth nuclear contours and regular small nucleoli (black curved arrow).

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21
Q
A

Bénin

Nodule folliculaire bénin avec modifications réactionnelles

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22
Q
A

Bénin

Dégénération kystique avec macrophages abondants et peu de cellules folliculaires bénignes.

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23
Q
A

Bénin - Thyroïdite lymphocytaire

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24
Q
A

Bénin - Thyroïdite lymphocytaire

Population lymphocytaire hétérogène avec petits lymphocytes matures et plus grands lymphocytes activés réactionnels

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25
Q
A

Bénin - Thyroïdite lymphocytaire

Cellules de Hürthle avec cytoplasme abondant identifiées en amas avec un infiltrat lymphocytaire en background

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26
Q
A

Bénin

Pap: Hürthle/oncocytic (white curved arrow) cells with abundant granular cytoplasm in a background of variably sized lymphocytes. Note the infiltration of lymphocytes into the groups of oncocytic cells (black solid arrow).

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27
Q
A

Bénin - Thyroïdite lymphocytaire

Polymorphous population of lymphocytes with tingible body macrophages (white curved arrow) in this Diff-Quik-stained smear from an active lymphocytic thyroiditis is shown.

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28
Q
A

Bénin - Thyroïdite de de Quervain

Granulome bien formé, non nécrosant

Histiocytes: noyaux allongés, disposés aléatoirement et aspect syncitial

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29
Q
A

Bénin

Thyroïdite granulomateuse

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30
Q
A

Bénin

Diff-Quik-stained slide shows granulomatous thyroiditis (GT). Chronic inflammation in the background may mimic lymphocytic thyroiditis.

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31
Q
A

Bénin - Thyroïdite subaiguë

Abondance de cellules géantes multinucléées

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32
Q
A

Bénin - Thyroïdite de de Quervain

Pap: multinucleated giant cells in a background of necrosis and acute and chronic inflammation. Multinucleated cells may have up to 50 nuclei per cell.

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33
Q
A

Bénin - Thyroïdite de Riedel

Étalement hypocellulaire

Rares cellules fusiformes

Rares cellules inflammatoires

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34
Q
A

Bénin - Goïtre amyloïde

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35
Q
A

Bénin - Goïtre amyloïde

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36
Q
A

Bénin - Thyroïde noire

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37
Q
A

Bénin

Thyroïde noire

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38
Q
A

Bénin - Thyroïde noire

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39
Q
A

Bénin - Modifications radiques

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40
Q

Patient déjà traité pour une néoplasie thyroïdienne

A

Bénin - Modifcations radiques

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41
Q
A

Bénin - Maladie de Graves

Cellules en flamèches

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42
Q
A

Bénin - Maladie de Graves

Diff-Quik-stained sheet of benign follicular cells shows marginal cytoplasmic vacuoles with magenta-pink frayed edges (black solid arrow), the so-called flame cells seen in Graves disease. (Courtesy S. Ali, MD.)

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43
Q
A

Bénin - Maladie de Graves

Noyaux augmentés de volume p/r hématies, vésiculaires avec nucléoles. Anisonucléose proéminente. Cytoplasme granulaire et « oncocytoïde ».

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44
Q
A

Bénin - Maladie de Graves

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45
Q
A

Bénin - Maladie de Graves

Pap-stained posttreatment aspirate of Graves disease shows Hürthle cells with atypia (black solid arrow), albeit with a low N:C ratio, and scattered lymphocytes (black curved arrow).

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46
Q
A

AUS/FLUS

Majorité des cellules bénignes et macrofollicules mais rares cellules avec chromatine pâle et membrane irrégulière

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47
Q
A

AUS/FLUS

Majorité des cellules ont un noyau élargit. (F/U était carcinome papillaire!)

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48
Q
A

AUS/FLUS

Cellules de revêtement kystique atypiques:

noyau élargit, nucléole et même une pseudoinclusion.

On en peut donc pas exclure totalement un carcinome papillaire

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49
Q
A

AUS/FLUS

Cellules histiocytoïdes: contrairement aux histiocytes, les vacuoles ont des contours très bien définis. Ceci suggère ++ un carcinome papillaire kystique.

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50
Q
A

AUS/FLUS

Augmentation du ratio N:C, cytoplasme varie entre histiocytoïde (flèche droite) et squamoïde (flèches courbées).

Histo: carcinome papillaire kystique.

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51
Q
A

AUS/FLUS

Peu cellulaire mais présence de microfollicules.

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52
Q
A

AUS/FLUS

Atypie architecturale (configuration 3D des cellules folliculaires) + atypie cytologique (noyau élargit, pâleur subtile et quelques incisures).

Histo: NIFTP

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53
Q
A

AUS/FLUS

Aspirat peu cellulaire avec uniquement cellules Hürthle

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54
Q
A

AUS/FLUS

Patient avec goître multinodulaire. La cytologie de 2 nodules est presque entièrement des oncocytes

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55
Q
A

AUS/FLUS

Atypies mais qui ne suggèrent pas un papillaire. Suggèrent plutôt un ATCD de traitement (a – Graves avec tapazole) (b – irradiation)

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56
Q
A

AUS/FLUS

Diff-Quik-stained smear shows random nuclear enlargement and atypia (black solid arrow) interpreted as AUS. Subsequent history revealed this patient was treated for Graves disease with radioactive iodine.

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57
Q
A

AUS/FLUS

Psammomes sans autres aspects papillaires

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58
Q
A

AUS/FLUS

Psammome isolé

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59
Q
A

AUS/FLUS

Infiltrat hétérogène de cellules lymphoïdes avec atypies occasionnelles et macrophage à corps tingibles.

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60
Q
A

AUS/FLUS

Pap stain of Hashimoto thyroiditis in an older patient with a population of larger blast-like cells (black solid arrow) raises a concern for lymphoma. Immunophenotyping by flow can resolve the issue if sufficient specimen is available.

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61
Q
A

Néoplasme folliculaire

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62
Q
A

Néoplasme folliculaire

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63
Q
A

Néoplasme folliculaire

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64
Q
A

Néoplasme folliculaire

Faible grossissement: aspirat cellulaire, cellules folliculaires uniformes arrangées en amas serrés et en microfollicules.

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65
Q
A

Néoplasme folliculaire

Faible grossissement: aspirat cellulaire, cellules folliculaires uniformes arrangées en amas serrés et en microfollicules.

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66
Q
A

Néoplasme folliculaire

Plus fort grossissement: noyaux ronds, uniformes en taille, avec chromatine fine et granulaire, nucléole discret

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67
Q
A

Néoplasme folliculaire

Plus fort grossissement: noyaux ronds, uniformes en taille, avec chromatine fine et granulaire, nucléole discret

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68
Q
A

Néoplasme folliculaire

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69
Q
A

Néoplasme folliculaire

Pap stain shows microfollicular complex with waxy green central colloid (white curved arrow) surrounded by follicular cells (black solid arrow) from a thyroid aspiration of a follicular carcinoma.

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70
Q
A

Néoplasme à cellules oncocytaires

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71
Q
A

Néoplasme à cellules oncocytaires

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72
Q
A

Néoplasme à cellules oncocytaires

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73
Q
A

Néoplasme à cellules oncocytaires

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74
Q
A

Néoplasme à cellules oncocytaires

Diff-Quik stain shows Hürthle cells with small cell dysplasia (cyan solid arrow) and large cell dysplasia with > 2x nuclear size variation (white solid arrow) in a case interpreted as suspicious for follicular neoplasm, Hürthle cell type.

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75
Q
A

Néoplasme à cellules oncocytaires

Amas composés exclusivement d’oncocytes

Small cell dysplasia: moins de cytoplasme (haut N:C)

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76
Q
A

Néoplasme à cellules oncocytaires

Dysplasie à petites cellules

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77
Q
A

Néoplasme à cellules oncocytaires

Oncocytes en feuillets syncytiaux ou isolés

Small et large cell dysplasia

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78
Q
A

Néoplasme à cellules oncocytaires

Cellules de Hürthle non cohésives

Small et large cell dysplasia

Absence de colloïde

Présence de vaisseaux qui traversent les amas

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79
Q
A

Néoplasme à cellules oncocytaires

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80
Q
A

Bénin - composante focale d’oncocytes

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81
Q
A

Carcinome médullaire

Pap : carcinoma médullaire - cellules discohésives, processus cytoplasmique, chromatique “coarse”, binucleation. Faire IHC.

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82
Q
A

Suspect de malignité

↑ taille noyau, chromatine clarifiée (poudrée), nucléole, incisure. Léger moulage (tête de flèche). Questionnement sur pseudoinclusions (flèches). Ces changements étaient focaux

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83
Q
A

Suspect de malignité

↑ taille noyau, chromatine clarifiée (poudrée), irrégularité membrane nucléaire, incisures, moulage et petit nucléoles. Ces changements étaient focaux

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84
Q
A

Suspect de malignité

Changements généralisés mais légers.

  • Noyaux légèrements ↑
  • Pâleur chromatinienne variable
  • Incisures
  • Nucléoles
  • Moulage minimal
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85
Q
A

Suspect de malignité

Diff Quick: Cellules histiocytoïdes aux cytoplasmes vacuolisés, nucléoles occasionnels, pseudoinclusions

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86
Q
A

Suspect de malignité

Suspicion de carcinome papillaire (Pap):

↑ nucléaire, chromatine pâle, irrégularité de la membrane, nucléoles

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87
Q
A

Suspect de malignité

Les cellules folliculaires aux abords de zone d’infarction, d’hémorragie ou de formation kystiques peuvent présenter des changements similaires à ceux du carcinome papillaire.

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88
Q
A

Suspect de malignité

Atypies secondaires au traitement par l’iode radioactif: anisonucléose, chromatine pâle, pseudo-inclusion. On ne peut éliminer la possibilité d’un carcinome papillaire lorsque les atypies sont aussi marquées, malgré l’histoire de traitement du patient.

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89
Q
A

Suspect de malignité

Amas microfolliculaires avec noyaux augmentés de taille, pâleur chromatinienne variable et rares incisures. À la résection, c’était un NIFTP.

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90
Q
A

Suspect de malignité

Suspect de carcinome papillaire, variante oncocytaire.

  • Hypercellulaire
  • Pseudoinclusions dans cellules oncocytaires.

DDX: néoplasme à cellules de Hürthle vs carcinome papillaire

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91
Q
A

Suspect de malignité

Diff Quick: Groupe lâche de cellules avec noyau +/- uniforme mais occasionnel noyau plus gros avec nucléole. Ratio N:C, aspect plasmacytoïde et nature du cytoplasme difficilement évaluables vu contours cytoplasmiques mal définis.

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92
Q
A

Suspect de malignité

Diff Quick: Cellules uniformes au cytoplasme granulaire et vacuolisé, bordures cytoplasmiques indistinctes. Les cellules sont légèrement dégénérées, ce qui limite l’évaluation.

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93
Q
A

Suspect de malignité

Ne contient que des cellules lymphoïdes, pour la plupart mal préservées. Quelques unes sont grosses et atypiques (b), le reste apparaissant en noyaux nus.

94
Q
A

Suspect de malignité (Lymphome MALT)

95
Q
A

Suspect de malignité (Lymphome de la thyroïde)

96
Q
A

Carcinome papillaire

Préparation en milieu liquide.

Patron en clou de tapissier des cellules tumorales entourant un psammome.

97
Q
A

Carcinome papillaire

98
Q
A

Carcinome papillaire

Absence de papilles; les cellules sont arrangées en amas très entassés avec noyaux qui se superposent.

Présence de psammomes.

99
Q
A

Carcinome papillaire

Étalement hypercellulaire avec feuillets monocouches et fragments papillaires

100
Q
A

Carcinome papillaire

Papilles avec axe fibrovasculaire (flèche blanche).

Plages de cellules détachées des axes (flèche noire)

101
Q
A

Carcinome papillaire

Papilles vraies avec axe fibrovasculaire

102
Q
A

Carcinome papillaire

Papille vraie avec axe fibro-vasculaire

103
Q
A

Carcinome papillaire

Formation pseudo-papillaire (absence d’axe fibrovasculaire)

104
Q
A

Carcinome papillaire

Tourbillon cellulaire: fortement caractéristique du carcinome papillaire classique. Agrégat concentrique de cellules tumorales, dont les cellules périphériques ont un noyau ovoïde et sont orientées perpendiculairement au rayon du tourbillon.

105
Q
A

Carcinome papillaire

106
Q
A

Carcinome papillaire

107
Q
A

Carcinome papillaire

108
Q
A

Carcinome papillaire

Incisures nucléaires, chromatine fine et poudreuse, micro-nucléoles

109
Q
A

Carcinome papillaire

Diff-Quik: ↑ taille nucléaire, overlapping, chromatine fine, absence colloïde

110
Q
A

Carcinome papillaire

Pap : multinucleated giant cell (white open arrow) and a syncytial group of cells with elongated nuclei. Nuclear grooves (white solid arrow) are present in most of the cells in this cluster.

111
Q
A

Carcinome papillaire variante folliculaire

112
Q
A

Carcinome papillaire variante folliculaire

Pap: microfolliculaire avec overlapping. Chromatine pale poudreuse, petits nucléoles, rare incisures. Pas de pseudo-inclusions.

DX: suspect de papillaire. Histo: NIFTP

113
Q
A

Carcinome papillaire variante folliculaire

114
Q
A

Carcinome papillaire variante macrofolliculaire

115
Q
A

Carcinome papillaire variante kystique

Changements kystiques proéminents avec macrophages/hémosidérophages abondants. Petit amas de cellules néoplasiques avec cytoplasme dense et une pseudo-inclusion.

116
Q
A

Carcinome papillaire variante kystique

Pap: rare groupe de cellules avec noyau élargit, incisures, irrégularité membrane nucléaire. Quantitativement insuffisant pour DX de PTC

117
Q
A

Carcinome papillaire variante kystique

Pap: cluster de cellules hypervacuolisées, au noyau élargit et irrégulier. Les cellules de la fleche noire sont dégénérées. Interprétation d’AUS car faible quantité de cluster

118
Q
A

Pap: suspect de carcinoma papillaire avec changements kystiques. Plusieurs macrophages (fleche noire), peu de cellules folliculaires. Celles-ci démontrent irrégularité nucléaire et pseudoinclusions. Leur quantité est insuffisante pour DX de carcinoma papillaire.

119
Q
A

Carcinome papillaire variante oncocytaire

Pap: cytoplasme granulaire abondant + noyaux de papillaire

120
Q
A

Carcinome papillaire variante oncocytaire

(Pap)

a- cellules polygonales à plasmacytoïdes oncocytaires, discohésives avec noyaux pâle, micronucléole, pseudoinclusions et incisures. Ces cas miment le carcinome médullaire!!!!

b- Multiples pseudoinclusions dans une cellule oncocytaire au cytoplasme granulaire

121
Q
A

Carcinome papillaire variante oncocytaire

Diff-Quik: cellules oncocytaires (cytoplasme granulaire abondant) au noyau irrégulier (flèche noire), possible pseudoinclusion (flèche blanche).

Critères nucléaires doivent être présent dans majorité des cellules pour DX de carcinome papillaire variante oncocytaire

122
Q
A

Carcinome papillaire variante warthin-like

Pap : cellules oncocytaires trabéculaires avec irrégularité nucléaires et incisures. Lymphocytes dans background

123
Q
A

Carcinome papillaire variante warthin-like

124
Q
A

Carcinome papillaire variante warthin-like

125
Q
A

Carcinome papillaire variante à cellules hautes

126
Q
A

Carcinome papillaire variante à cellules hautes

Pap : cellules haute (hauteur 3x largeur) discohésives. Majorité des cellules ont une queue cytoplasmique.

127
Q
A

Carcinome papillaire variante à cellules hautes

Pap : Pléomorphisme modéré-sévère. Présence de cellules allongées (fleche courbe noire), cytoplasmes clairs (fleche noire) ou oncocytaire (fleche vide

128
Q
A

Carcinome papillaire avec un noyau en bulle de savon avec pseudo-inclusions multiples

129
Q
A

Carcinome papillaire

Cellules hautes, avec cytoplasme 3x plus haut que large

130
Q
A

Carcinome papillaire variante à cellules cylindriques

131
Q
A

Carcinome papillaire variante à cellules cylindriques

Cellules peu cohésives, fusiformes.

132
Q
A

Carcinome papillaire variante solide

133
Q
A

Carcinome papillaire variante sclérosante diffuse

Fragments papillaires avec psammomes dans un background lymphocytaire

Chromatine plus foncée que dans la variante classique

134
Q
A

Carcinome papillaire variante sclérosante diffuse

Pap: Apparence squamoïde des cellules néoplasiques (qui n’ont pas ici les critères de carcinome papillaire). Peut être retrouvé de façon focale dans le carcinome papillaire classique mais en cas de variante sclérosante, sera plus étendue.

135
Q
A

Carcinome papillaire variante sclérosante diffuse

136
Q
A

Carcinome papillaire variante sclérosante diffuse

Diff-Quik stain : amas syncytial de cellules néoplasiques + stroma magenta

137
Q

Présence de caractéristiques nucléaires papillaires

A

Carcinome variante cribriforme-morulaire

Pap: plages fenestrés de cellules avec espaces vides sans colloïde

138
Q
A

Carcinome papillaire variante cribriforme morulaire

Pap: Fragments cohésifs complexes avec pseudoinclusions mais chromatine foncée.

Histo: morules cribriformes

139
Q
A

Carcinome papillaire

Cordons anastomoses de cellules avec incisures. Comme les critères nucléaires du papillaires sont rares DX définitif difficile

140
Q
A

Carcinome papilliare variante en clous de tapissier

141
Q
A

Carcinome papillaire variante en clou de tapissier

Diff-Quik : cellule en teardrop avec atypie et cytoplasme abundant (fleche noire).

Noyaux excentrés produisants un “bulge” donnant une apparence hobnail (fleche noire)

142
Q
A

Carcinome papillaire variante en clous de tapissiers

143
Q
A

Carcinome pauvrement différencié

Patron architectural variable pouvant inclure des amas, des microfollicules et de nombreuses cellules isolées

144
Q
A

Carcinome pauvrement différencié

Petites cellules folliculaires arrangées en insulae avec entassement

145
Q
A

Carcinome pauvrement différencié

Des cellules endothéliales enveloppent souvent les insulae

146
Q
A

Carcinome pauvrement différencié

Diff-Quik: cellules isolées sur fond hémorragique sans colloïde. Vagues microfollicules et quelques cellules plus atypiques. Rare cellules oncocytaire (fleche bleue).

147
Q
A

Carcinome pauvrement différencié

Pap : architecture trabéculaire. Petites cellules uniformes avec haut ratio N:C et quelques noyaux convolués (raisinoïdes) (fleche blanche ouverte). Mitose (fleche blanche fermée)

148
Q
A

Carcinome pauvrement différencié

149
Q
A

Carcinome anaplasique

150
Q
A

Carcinome anaplasique

151
Q
A

Carcinome anaplasique

152
Q
A

Carcinome anaplasique

Diff-Quik: cellules malignes pléomorphes, nucléoles proéminents (fleche) et cytoplasme vaporeux

153
Q
A

Carcinome anaplasique

Pap: Cellules épithélioïdes (polygonales) pléomorphes. Éclaircissement chromatinien et irrégularité contours nucléaires.

154
Q
A

Carcinome anaplasique

Diff-Quick: Moins de pléomorphisme dans ces cellules majoritairement rondes, mais mitoses facilement identifiables

155
Q
A

Carcinome anaplasique

Cellules tumorales fusiformes avec cytoplasme effilé

156
Q
A

Carcinome anaplasique

Fragment de tumeur composée majoritairement de cellules fusiformes.

157
Q
A

Carcinome anaplasique

Pap: PMN ++ , cellules tumorales dont une est multinucléée.

158
Q
A

Carcinome anaplasique

Papa: Pléomorphisme dans ces cellules tumorales épithélioïdes. Formes binucléées, macronucléoles, chromatine clumpée et par endroit éclaircie (flèche). PMN.

159
Q
A

Carcinome anaplasique

Pap: cellule tumorale géante multinucléée infiltrée par PMN

160
Q
A

Carcinome anaplasique

Pap : cellules pléomorphes avec irrégularité de la membrane, chromatine grossière, macronucléoles (fleche)

161
Q
A

Carcinome anaplasique

Pap : Cluster hyperchromatiques avec overlapping alternant avec cellules malignes indifférenciées (flèches). Inflammation et nécrose dans background

162
Q
A

Carcinome anaplasique

163
Q
A

Carcinome médullaire

Flèche = amyloïde

164
Q
A

Carcinome médullaire

165
Q
A

Carcinome médullaire

Pap: Cellules isolées plasmacytoïdes ou polygonales avec chromatine sel et poivre, petits/pas nucléoles. Flèche = amyloïde

166
Q
A

Carcinome médullaire

167
Q
A

Carcinome médullaire

168
Q
A

Carcinome médullaire

169
Q
A

Carcinome médullaire

Grosse cellule tumorale avec granules cytoplasmiques rouges sur le Romanowsky

Flèche: pseudo-inclusion

Pointe de flèche: amyloïde

170
Q
A

Carcinome médullaire

Pap: Pigmentation mélanotique (DDX mélanome qui lui aussi est en cellules isolées, épithélioïde ou fusiforme avec binucléations)

171
Q
A

Carcinome médullaire

Amyloïde abondante: matériel amorphe, cireux, vert pâle

172
Q
A

Amyloïde dans une préparation en milieu liquide: dense, amorphe et cireuse

173
Q
A

Carcinome médullaire

Pap : cellules discohésives, rondes et uniformes (DDX lymphome). Dépôts amyloides (flèches), difficile à distinguer de colloïde dense.

174
Q
A

Carcinome médullaire

Pap : cellules fusiformes avec queues cytoplasmiques. Noyaux réguliers avec chromatine sel et poivre, dispersée.

175
Q
A

Carcinome médullaire

Diff-Quik : carcinoma médullaire oncocytaire avec granules métachromatiques.

176
Q
A

Carcinome médullaire

Diff-Quik : cellules rondes et régulières avec amyloÏde.

177
Q
A

Carcinome médullaire

Pap: mixte de cellules fusiformes, bipolaires, oncocytaires avec pléomorphisme nucléaire

178
Q
A

Carcinome médullaire

Atypie neuroendocrine: une cellule oncocytaire très atypique

179
Q
A

Carcinome épidermoïde

180
Q
A

Carcinome épidermoïde

181
Q
A

Carcinome épidermoïde

182
Q
A

Lymphome MALT

183
Q
A

DLBCL

184
Q
A

Lymphome

185
Q
A

Lymphome

186
Q
A

Figure 10-03A. Benign Follicular Nodule. (A) The fine-needle aspirate contains tissue fragments containing intact macrofollicles (Papanicolaou stain).

187
Q
A

Figure 10-03B. Benign Follicular Nodule. (B) Macrofollicles often break into fragments and appear as sheets of various sizes. Although colloid is scant in this case, a predominantly macrofollicular architecture can be inferred from these fragments (Papanicolaou stain).

188
Q
A

Figure 10-04A. Benign Follicular Nodule. (A) The follicular cells comprising this unfolded macrofollicle are evenly spaced. Pale green-blue colloid has escaped from the follicle (Papanicolaou stain).

189
Q
A

Figure 10-04B. Benign Follicular Nodule. (B) Normal follicular cells have coarsely granular chromatin; cytoplasm can be scant or moderately abundant (Papanicolaou stain).

190
Q
A

Figure 10-05. Colloid (Benign Follicular Nodule). Colloid can congeal into opaque, irregularly shaped hyaline chunks with hard edges that are clearly visible on smears and liquid-based preparations (Papanicolaou stain).

191
Q
A

Figure 10-06A. Colloid (Benign Follicular Nodule). (A) On smears, watery colloid often covers the entire slide as a thin, translucent film (pink in this image) and is often admixed with blood (Papanicolaou stain).

192
Q
A

Figure 10-06A. Colloid (Benign Follicular Nodule). (B) On liquid-based preparations, watery colloid appears as torn, translucent sheets resembling tissue paper (Papanicolaou stain).

193
Q
A

Figure 10-07. Focal Hürthle Cell Metaplasia, Multinodular Goiter. Hürthle cells are a common finding in some cases of multinodular goiter. The cells are large and polygonal and have abundant, finely granular cytoplasm. Variation in nuclear size, as seen here, is common in nonneoplastic hürthle cell proliferations and does not signify neoplasia (Papanicolaou stain).

194
Q
A

Figure 10-08. Cyst Lining Cells. Reactive follicular cell changes are often seen adjacent to areas of cystic degeneration. They have a characteristic pulled-out appearance that mimics reparative epithelium (Papanicolaou stain).

195
Q
A

Figure 10-09A. Chronic Lymphocytic (Hashimoto) Thyroiditis. (A) Lymphoid cells are the predominant feature. Most are small, mature lymphocytes (Papanicolaou stain).

196
Q
A

Figure 10-09B. Chronic Lymphocytic (Hashimoto) Thyroiditis. (B) The heterogeneity of the lymphoid cells is better appreciated with air-dried preparations (Romanowsky stain).

197
Q
A

Figure 10-09B. Chronic Lymphocytic (Hashimoto) Thyroiditis. (C) Dendritic-lymphocytic aggregates are often present. Dendritic cells have a large vesicular nucleus and conspicuous nucleolus (arrow) (Papanicolaou stain).

198
Q
A

Figure 10-09D. Chronic Lymphocytic (Hashimoto) Thyroiditis. (D) Hürthle cells with abundant cytoplasm are usually identified in clusters. Note the scattered lymphoid cells (Romanowsky stain).

199
Q
A

Figure 10-10. Subacute Thyroiditis. (A) The most conspicuous finding is an abundance of multinucleated giant cells with bizarre shapes (Papanicolaou stain).

200
Q
A

Figure 10-10. Subacute Thyroiditis. (B) Granulomas are often few in number. The nuclei of epithelioid histiocytes have a variety of elongated and curved shapes. Cytoplasm is abundant, clear, and poorly demarcated (Papanicolaou stain).

201
Q
A

Figure 10-11. Amyloid Goiter. Like colloid, amyloid forms opaque masses with irregular, sharp edges. Amyloid is deposited in the interstitium in patients with amyloid goiter; hence, aspirated amyloid fragments often contain entrapped fibroblasts (Papanicolaou stain).

202
Q
A

Figure 10-12. Black Thyroid. Follicular cells contain abundant coarse, brown cytoplasmic granules (Papanicolaou stain).

203
Q
A

Figure 10-13. Radioactive Iodine Effect. Follicular cells show marked variation in cellular and nuclear size, sometimes with conspicuous cytoplasmic vacuolization (Papanicolaou stain).

204
Q
A

Figure 10-14A. Suspicious for a Follicular Neoplasm. (A) A neoplasm should be suspected whenever a specimen is composed predominantly of microfollicles (Papanicolaou stain).

205
Q
A

Figure 10-14A. Suspicious for a Follicular Neoplasm. (B) The cells of some follicular neoplasms are crowded haphazardly into cords or ribbons (trabeculae) (Papanicolaou stain).

206
Q
A

Figure 10-15. Suspicious for a Follicular Neoplasm, Hürthle Cell Type. The sample is at least moderately cellular and composed exclusively of Hürthle cells (Papanicolaou stain).

207
Q
A

Figure 10-16A. Mimics of a Hürthle Cell Neoplasm. (A) Metastatic renal cell carcinoma to the thyroid. The abundant cytoplasm of clear cell renal cell carcinomas mimics that of a Hürthle cell neoplasm, but it is thinner and more fragile-appearing than Hürthle cell cytoplasm (Papanicolaou stain).

208
Q

Marquage IHC pour la PTH

A

Figure 10-16A. Mimics of a Hürthle Cell Neoplasm. (B) Parathyroid carcinoma. Some parathyroid neoplasms have abundant oncocytic cytoplasm. The patient presented with hyperparathyroidism; a positive immunostain for parathyroid hormone on the cell block preparation was helpful for diagnosis (Papanicolaou stain).

209
Q
A

Figure 10-17. Papillary Thyroid Carcinoma, Classical Type. In classical papillary thyroid carcinoma, papillae with fibrovascular cores are often seen (Papanicolaou stain).

210
Q
A

Figure 10-18. Papillary Thyroid Carcinoma, Classical Type. In some cases, papillae are absent, and the neoplastic cells are arranged in crowded sheets. Psammoma bodies are present (Papanicolaou stain).

211
Q
A

Figure 10-19A. (A) Papillary thyroid carcinoma, follicular variant.

212
Q
A

Figure 10-19B. (B) Follicular neoplasm (follicular adenoma).

213
Q
A

Figure 10-20. Papillary Thyroid Carcinoma. The neoplastic cells have pale, powdery chromatin. Other important nuclear changes are the circular, sharply defined intranuclear pseudoinclusion (arrow) and the nuclear groove (arrowhead). Note that the pseudoinclusion has the same color and consistency as the surrounding cytoplasm; a purely white hole is usually an artifact (Papanicolaou stain).

214
Q
A

Figure 10-21A. Papillary Thyroid Carcinoma Variants. (A) Oncocytic variant. The neoplastic cells of this variant have abundant granular cytoplasm resembling hürthle cell cytoplasm. Note the intranuclear pseudoinclusions (holes) (Papanicolaou stain).

215
Q
A

Figure 10-21B. Papillary Thyroid Carcinoma Variants. (B) Tall cell variant. The cells are large and have abundant elongated (“tall”) cytoplasm. Nuclear features typical of papillary carcinoma, including numerous intranuclear holes, are apparent (Papanicolaou stain).

216
Q
A

Figure 10-22A. Noninvasive Follicular Thyroid Neoplasm with Papillary-Like Nuclear Features (Niftp). (A) NIFTP is often a predominantly microfollicular proliferation. Nuclear features of papillary carcinoma are incomplete or only focally present (inset). This FNA was interpreted as suspicious for papillary carcinoma.

217
Q
A

Figure 10-23A. Poorly Differentiated Thyroid Carcinoma. (A) The architectural pattern is variable and may include crowded groups, microfollicles, and numerous isolated cells. The isolated malignant cells resemble those of medullary thyroid carcinoma (Papanicolaou stain).

218
Q
A

Figure 10-23A. Poorly Differentiated Thyroid Carcinoma. (B) Some tumors have a greater degree of nuclear atypia (Papanicolaou stain).

219
Q
A

Figure 10-24A. Anaplastic Thyroid Carcinoma. (A) Tumor cells are dispersed as isolated epithelioid cells. Nuclei are large and hyperchromatic, and multinucleated tumor giant cells are present (Papanicolaou stain).

220
Q
A

Figure 10-24A. Anaplastic Thyroid Carcinoma. (B) Some tumors have a predominantly sarcomatoid appearance (Romanowsky stain).

221
Q
A

Figure 10-25A. Primary Thyroid Lymphomas. (A) Diffuse large B-cell lymphoma. The large dispersed cells can mimic an anaplastic carcinoma. Lymphoglandular bodies are helpful and point to a lymphoid rather than epithelial neoplasm (Romanowsky stain).

222
Q
A

Figure 10-25A. Primary Thyroid Lymphomas. Hodgkin lymphoma. Reed-Sternberg cells can be prominent and mimic the cells of anaplastic carcinoma (Papanicolaou stain).

223
Q
A

Figure 10-26. Squamous Cell Carcinoma. A pleomorphic malignancy in the thyroid that is comprised of keratinized cells is considered a squamous cell carcinoma, but it has the same clinical behavior as an anaplastic carcinoma (Papanicolaou stain).

224
Q
A

Figure 10-27A. Medullary Thyroid Carcinoma. (A) Smears show numerous isolated cells and small blobs of amyloid (arrows) (Papanicolaou stain).

225
Q
A

Figure 10-27A. Medullary Thyroid Carcinoma. (B) Air-dried Romanowsky-stained preparations show fine red cytoplasmic granules, a helpful diagnostic feature.

226
Q
A

Figure 10-27A. Medullary Thyroid Carcinoma. C) Some medullary carcinomas have prominent intranuclear pseudoinclusions (Papanicolaou stain).

227
Q
A

Figure 10-28. Extranodal Marginal Zone B-Cell Lymphoma of the Thyroid. The neoplastic lymphoid cells are uniformly small to medium-sized, and there’s a prominent population of cells with irregularly shaped nuclei and prominent nucleoli (Papanicolaou stain).

228
Q
A

Figure 10-29A. Atypia of Undetermined Significance. (A) Cytologic atypia. The follicular cell nuclei are enlarged and irregular in contour, but precise classification is challenging because of obscuring blood and clotting elements (Papanicolaou stain).

229
Q
A

Figure 10-29A. Atypia of Undetermined Significance. (B) Architectural atypia. This sample is comprised mostly of microfollicles but is sparsely cellular and thus does not fulfill criteria for “suspicious for a follicular neoplasm” (Papanicolaou stain).

230
Q
A

Figure 10-30. Parathyroid Adenoma. Smears are often highly cellular, and the cells are arranged in groups that resemble microfollicle fragments or, as see here, trabeculae. Colloid is absent (hematoxylin and eosin stain).