GU Flashcards
1
Q
Diagnosis?
A/W?
Organisms?
Presentation?
A
XANTHOGRANULOMATOUS PYELONEPHRITIS
- Often associated with large staghorn calculi of renal pelvis
- Many of these patients may have UTI, secondary to E. coli or Proteus
- May presents as a mass-like lesion
2
Q
Diagnosis?
Age?
2 syndromes?
A
BILATERAL DIFFUSE CYSTIC KIDNEY DISEASE
- Autosomal dominant polycystic kidney disease
- Acquired cystic kidney disease
- Tuberous sclerosis
- von Hippel Lindau
3
Q
Diagnosis?
Presentation?
Age?
Prognosis?
A
CYSTIC NEPHROMA
- Presents as a multilocular renal cyst
- Bimodal in age distribution: children less than 4 years of age, young women
- Excellent prognosis
4
Q
Diagnosis?
Presentation?
Prognosis?
A
MULTILOCULAR CYSTIC RCC
- Presents as a multilocular renal cyst
- Excellent prognosis; classified by the WHO as a neoplasm of low-malignant potential
5
Q
Diagnosis?
Gross/Microscopic criteria?
Stains?
A
RENAL ONCOCYTOMA
- Gross:
- Circumscribed, not encapsulated
- Mahogany brown, central scar
- No gross necrosis
- Micro:
- Tight nests and alveoli surrounded by myxoid or hyalinized hypocellular stroma
- Diffuse, granular eosinophilic cytoplasm
- Uniformly rounded nuclear contours
- No frequent/atypical mitoses, sheets, sarcomatoid
- Perinephric fat involvement permissible if the above histologic criteria are satisfied
- Positive stains:
- CD117
- Negative stains:
- CK7
6
Q
Diagnosis?
Gross/Microscopic?
Staining?
Syndrome?
A
CHROMOPHOBE RCC
- Gross:
- Presents as a cortical neoplasm, classically mahogany brown in color
- MIcro:
- Solid, sheet-like growth pattern
- Clear to eosinophilic cytoplasm with perinuclear halos
- Plant-like cell membrane
- Raisinoid nuclear contours
- Positive Stains
- CK7
- CD117
- Hale colloidal iron
- AE1/AE3
- Negative Stains
- Vimentin
- Carbonic anhydrase IX
- Birt Hogg Dube syndrom: chromophobe/oncocytoma
7
Q
6 Renal Syndroms?
A
- von Hippel Lindau
- Birt Hogg Dube
- Hereditary leiomyomatosis and RCC
- Hereditary papillary RCC
- Constitutional chromosome 3 translocation
- Succinate dehydrogenase
8
Q
Birt Hogg Dubé
A
Birt Hogg Dubé
- Genetic Abnormality
- FLEN, 17p11.2, dominant
- Extra-renal
- Cutaneous fibrofolliculomas, trichodiscomas, skin tags, lung cysts & pneumothorax
- Renal Carcinoma
- Multiple hybrid chromophobe-oncocytomas
9
Q
von Hippel Lindau
A
von Hippel Lindau
- Genetic Abnormality
- VHL, 3p25, dominant
- Extra-renal
- Retinal and CNS hemangioblastomas, pancreatic and other cystadenomas, pheochromocytomas
- Renal Carcinoma
- Multiple clear cell carcinomas
10
Q
Hereditaary leiomyomatosis and renal cell carcinoma
A
Hereditaary leiomyomatosis and renal cell carcinoma
- Genetic Abnormality
- FH, 1q42-43, dominant
- Extra-renal
- Cutaneous and uterine leiomyomas, rare kindreds with uterine leiomyosarcoma
- Renal Carcinoma
- Aggressive papillary RCC
11
Q
Hereditary papillary RCC
A
Hereditary papillary RCC
- Genetic Abnormality
- MET, 7q31, dominant
- Extra-renal
- None
- Renal Carcinoma
- Multiple type 1 papillary RCC
12
Q
Constitutional chromosome 3 translocation
A
Constitutional chromosome 3 translocation
- Genetic Abnormality
- Various, dominant
- Extra-renal
- None
- Renal Carcinoma
- Multiple clear cell RCC
13
Q
A
Succinate dehydrogenase deficiency
- Genetic Abnormality
- SDH, usually B, 1p36, may be recessive
- chromosomes 11 and 1, susceptibility loci ‘paraganglioma locus’ (PGL)
- SDHD –> PGL1 on 11q23
- SDHAF2 –> PGL2 on 11q13.1
- SDHC –> PGL3 on 1q21
- SDHB –> PGL4 on 1p36.1–p35
- SDHA
- Extra-renal
- Hereditary paraganglioma/phaeochromocytoma syndrome (HPGL/PCC)
- Pheochromocytomas
- Paragangliomas, head & neck
- GIST, gastric
- Hereditary paraganglioma/phaeochromocytoma syndrome (HPGL/PCC)
- Succinate dehydrogenase deficiency RCC
- Nests/sheets of polygonal cells with bubbly, eosinophilic/clear cytoplasm
- Neuroendocrine nuclei
- Entrapped tubules
14
Q
9 Types of RCC?
+/- 10th?
A
9 Types of RCC
- Clear cell RCC
- Papillary RCC
- Chromophobe RCC
- Collecting duct carcinoma
- Medullary carcinoma
- Xp11 Translocation RCC
- Mucinous tubular & spindle cell carcinoma
- Clear cell papillary RCC
- Tubulocystic RCC
- Multilocular Cystic Renal Cell Carcinoma
15
Q
Diagnosis?
Prognosis?
Associated with?
Stains?
A
Clear Cell Papillary Renal Cell Carcinoma
- Tubular, cystic and papillary patterns
- Single layer of cuboidal cells, scant eosinophilic or moderate clear cytoplasm, subnuclear clearing
- Low grade and stage
- Positive stains:
- CK7, +/- focal CD10
- Negative stains:
- Racemase
- Sporadic, ESRD
16
Q
Type?
Cytogenetics?
A
PAPILLARY RCC
- Type 1
- small cells, clear to basophilic cytoplasm, single layer of small oval nuclei, inconspicuous nucleoli
- foamy macrophages and/or edema, psammoma bodies and calcium oxalate crystals
- low grade
- Type 2
- large cells, abundant eosinophilic cytoplasm, pseudostratified or apical large spherical nuclei, prominent nucleoli
- macrophages, edema, psammoma bodies
- high grade
- Cytogenetics: 7+, 17+, Y-
- Better prognosis than clear cell RCC
- Positive stains: CK7, Rasimase
17
Q
Differential Diagnosis?
A
SARCOMATOID DDx:
- Sarcomatoid RCC (clear cell, chromophobe)
- (+) AE1/AE3, PAX8
- (-) CK903, GATA3
- Sarcomatoid urothelial carcinoma
- (+) CK903, GATA3
- (-) AE1/AE3, PAX8 (80%)
- Sarcoma
- (-) all
18
Q
Diagnosis?
AKA?
Prognosis?
Stains?
A
COLLECTING DUCT CARCINOMA
- AKA Bellini duct carcinoma
- Firm mass in medulla
- Infiltrating tubular or tubulopapillary
- Desmoplastic stroma
- +/- cytoplasmic and intraluminal mucin
- High grade
- Poor prognosis
- Rule out met
- (+) E-cadherin, PAX8, L&Hmw CK (var)
- (-) AMACR, racemase, CD10, CK20
19
Q
3 Renal tumors with desmoplasia?
A
3 Renal tumors with desmoplasia
- Urothelial carcinoma
- Collecting duct carcinoma
- Met
20
Q
Diagnosis?
Associated with?
Prognosis?
A
MEDULLARY CARCINOMA
- Medulla
- Typically young black man with sickle cell trait
- High-grade undifferentiated carcinoma
- INI1 negative
- Dismal prognosis
21
Q
Diagnosis?
Associated with?
Stains?
A
ANGIOMYOLIPOMA
- Sporadic or tuberous sclerosis
- tuberous sclerosis
- multifoca/bilateral, often associated with renal cysts/RCC
- Variants: regional nodal involvement, extrarenal disease (liver, spleen, lung), epithelioid AML
- Immunoreactive for actins and melanocytic markers
- Perivascular epitheliod cells - PEComa
22
Q
Diagnosis?
Risks?
A
EPITHELIOID ANGIOMYOLIPOMA RISK ASSESMENT
- TS COMPLEX OR CONCURRENT AML
- NECROSIS
- > 7 CM IN SIZE
- EXTRARENAL EXTENSION
- CARCINOMA-LIKE GROWTH PATTERN
23
Q
Diagnosis?
Associated with?
Stains?
A
NEPHROGENIC ADENOMA
- Often associated with history of GU instrumentation, trauma or calculi
- GU tract, urinary bladder most common site
- Papillary tubulo-cystic growth pattern; hobnail nuclear contours
- IHC: PAX 8+, AMACR+
24
Q
Diagnosis?
Location?
Stains?
A
CLEAR CELL CARCINOMA OF GU TRACT
- Most commonly seen in female urethra
- Can be confused with nephrogenic adenoma
- PSA and PAP+
25
Q
Diagnosis?
Stains?
A
POSTOPERATIVE SPINDLE CELL NODULE/PSEUDOSARCOMATOUS FIBROMYXOID TUMOR
- Many are immunoreactive for ALK-1 – inflammatory myofibroblastic tumor
- Can locally recur
- Variably reactive for pankeratin; actin stains accentuate the cytoplasmic membranes – tram track pattern
26
Q
Diagnosis?
Associated with?
5 Variants?
Stains?
A
UROTHELIAL CARCINOMA
- Strong association with smoking
- more commonly seen in men
- Variants: micropapillary, nested, sarcomatoid, squamous and glandular differentiation
- IHC markers: CK7, CK20, CK903, p63, GATA3
27
Q
Urothelial papilloma
vs.
Papillary urothelial neoplasm of low malignat potential
vs.
Low grade papillary urothelial carcinoma
A
28
Q
A
29
Q
A
Mucinous tubular and spindle cell carcinoma
- Histology:
- Well-circumscribed with partial surrounding rim of compressed fibrous tissue
- tubular/cordlike
- uniform, low cuboidal cells with eosinophilic, focally vacuolated cytoplasm
- spindling
- low grade nuclei
- Stroma is myxoid and bubbly, abundant extracellular mucin, foamy macrophages
- Can be mucin poor (highlighted by Alcian blue), well formed papillae, clear cells, necrosis
- Positive: EMA, AMACR, AE1-AE3, CK7, CK 8/18, CK19, PAS (highlights basal lamina around tubules), Alcian blue highlights mucin; also neuron specific enolase and either chromogranin or synaptophysin
- Loss of multiple chromosomes
- Negative for trisomy 7 and 17
30
Q
A
Translocation carcinoma (Xp11 )
- TFEE on Xp11.2
- t(X;17)(p11.2;q25) –> TFE3-ASPL fusion gene (low grade)
- t(X;1)(p11.2;p34) –> TFE3-PSF fusion gene
- t(X;1)(p11.2;q21) –> TFE3-PRCC fusion gene (high grade)
- proximal tubule
- F > M
- kids > adults
- Gross: similar to RCC
- Histology: nests of discohesive cells with clear/eosinophilic cytoplasm, +/- papillary
- Neg: CK
- TFE3+ IHC, FISH better
31
Q
A
Translocation carcinoma (6p21 )
- TFEB on 6p21
- worse than classic RCC
- proximal tubule
- F > M
- kids > adults
- Gross: similar to RCC
- Histology:
- solid/alveolar, clear/eosinophilic cytoplasm
- pink basement membrane material
- Fuhrman nuclear grade 3 nuclei
- CK neg
- TFEB+ IHC, FISH better
32
Q
Fuhrman Grading System
A
Fuhrman Grading System
- Grade X Cannot be assessed
- Grade 1
- Nuclei round, uniform, approximately 10 µm in diameter; nucleoli inconspicuous or absent
- Grade 2
- Nuclei slightly irregular, approximately 15 µm in diameter; nucleoli evident (20-40x)
- Grade 3
- Nuclei very irregular, approximately 20 µm in diameter; nucleoli large and prominent (10x)
- Grade 4
- Nuclei bizarre and multilobated, 20 µm or greater in diameter, nucleoli prominent, chromatin clumped
33
Q
Kidney pTNM Staging
Primary Tumor (pT)
- pTX:
- pT0:
- pT1:
- pT1a:
- pT1b:
- pT2:
- pT2a:
- pT2b:
- pT3:
- pT3a:
- pT3b:
- pT3c:
- pT4:
A
Kidney pTNM Staging
Primary Tumor (pT)
- pTX: Primary tumor cannot be assessed
- pT0: No evidence of primary tumor
- pT1: Tumor <= 7 cm, limited to the kidney
- pT1a: <= 4 cm, limited to the kidney
- pT1b: 4 - 7 cm, limited to the kidney
- pT2: > 7 cm, limited to the kidney
- pT2a: 7 - 10 cm, limited to the kidney
- pT2b: > 10 cm, limited to the kidney
- pT3: Tumor extends into major veins or perinephric tissues but not into the ipsilateral adrenal gland and not beyond Gerota’s fascia
- pT3a: Tumor grossly extends into the renal vein or its segmental (muscle containing) branches, or tumor invades perirenal and/or renal sinus fat but not beyond Gerota’s fascia
- pT3b: Tumor grossly extends into the vena cava below the diaphragm
- pT3c: Tumor grossly extends into vena cava above diaphragm or invades the wall of the vena cava
- pT4: Tumor invades beyond Gerota’s fascia (including contiguous extension into the ipsilateral adrenal gland)
34
Q
Regional Lymph Nodes (pN)
Distant Metastasis (pM)
A
Regional Lymph Nodes (pN)
- pNX: Regional lymph nodes cannot be assessed
- pN0: No regional lymph node metastasis
- pN1: Metastasis in regional lymph node(s)
Distant Metastasis (pM)
- pM1: Distant metastasis
35
Q
Label kidney pT
A
36
Q
Kidney Stage Grouping
A
Kidney Stage Grouping
37
Q
Bladder Primary Tumor (pT)
A
Bladder Primary Tumor (pT)
- pTX: Primary tumor cannot be assessed
- pT0: No evidence of primary tumor
- pTa: Noninvasive papillary carcinoma
- pTis: Carcinoma in situ: “flat tumor”
- pT1: Tumor invades subepithelial connective tissue (lamina propria)
- pT2: Tumor invades muscularis propria (detrusor muscle)
- pT2a: Tumor invades superficial muscularis propria (inner half)
- pT2b: Tumor invades deep muscularis propria (outer half)
- pT3: Tumor invades perivesical tissue
- pT3a: Microscopically
- pT3b: Macroscopically (extravesicular mass)
- pT4: Tumor invades any of the following: prostatic stroma, seminal vesicles, uterus, vagina, pelvic wall, abdominal wall
- pT4a: Tumor invades prostatic stroma or uterus or vagina
- pT4b: Tumor invades pelvic wall or abdominal wall
38
Q
Bladder Regional Lymph Nodes (pN)
Distant Metastasis (pM)
A
Bladder Regional Lymph Nodes (pN)
- pNX: Lymph nodes cannot be assessed
- pN0: No lymph node metastasis
- pN1: Single regional lymph node metastasis in the true pelvis (hypogastric, obturator, external iliac or presacral lymph node)
- pN2: Multiple regional lymph node metastasis in the true pelvis (hypogastric, obrutrator, external iliac or presacral lymph node metastasis)
- pN3: Lymph node metastasis to the common iliac lymph nodes
Distant Metastasis (pM)
- Not applicable
- pM1: Distant metastasis
39
Q
Bladder Stage Grouping
A
Bladder Stage Grouping
40
Q
Label Bladder pT
A
Bladder pT
41
Q
Prostate Primary Tumor (pT)
A
Prostate Primary Tumor (T): Clinical Classification
- TX Primary tumor cannot be assessed
- T0 No evidence of primary tumor
- T1 Clinically inapparent tumor neither palpable nor visible by imaging
- T1a Tumor incidental histologic finding in 5% or less of tissue resected
- T1b Tumor incidental histologic finding in more than 5% of tissue resected
- T1c Tumor identified by needle biopsy (eg, because of elevated prostate specific antigen [PSA])
- pT2 Confined to prostate
- pT2a Unilateral, 1/2 of 1 side or less
- pT2b Unilateral, > 1/2 of 1 side
- pT2c Bilateral
- pT3 Extraprostatic extension
- pT3a Extraprostatic extension or microscopic bladder neck invasion
- pT3b Seminal vesicle invasion
- pT4 Invasion of rectum, levator muscles and/or pelvic wall
42
Q
Prostate Regional Lymph Nodes (pN)
Distant Metastasis (pM)
A
Prostate Regional Lymph Nodes (pN)
- pNX: Cannot be assessed
- pN0: No regional lymph node metastasis
- pN1: Metastasis in regional lymph node or nodes
Distant Metastasis (pM)
- Not applicable
- pM1: Distant metastasis
- pM1a: Nonregional lymph nodes(s)
- pM1b: Bone(s)
- pM1c: Other site(s) with or without bone disease
43
Q
Prostate Stage Grouping
A
Prostate Stage Grouping
44
Q
Label Prostate pT
A
Label Prostate pT
45
Q
Gleason Grading:
- Needle bx
- TURP
- Radical prostatectomy
A
Gleason Grading:
- Needle bx
- Predominant + Worst
- TURP
- Predominant + Worst
- Radical prostatectomy
- Predominant + Secondary
- Mention worst in Dx
46
Q
Diagnosis
Stains?
A
SEMINOMA
- Most common of the pure germ cell tumor of testis
- slightly older age group compared to the non-seminomatous germ cell tumor
- Tumor markers generally negative; mild elevation of bHCG levels in cases with isolated syncytial trophoblasts
- Positive: SALL4, OCT3/4, CD117, Podoplanin, SOX17
- Negative: Glypican3, CD30, AE1/AE3, SOX2
47
Q
Diagnosis?
Stains?
A
SPERMATOCYTIC SEMINOMA
- older men
- indolent in behavior unless there is a sarcomatous component
- Solid growth pattern, often interrupted by lakes of edema
- Filamentous spireme chromatin, uniform rounded nuclear contours, increased mitotic activity
- Negative for IGCNU (intratubular germ cell neoplasia unclassified); Can have intratubular growth
- Positive: SALL4
- Negative: OCT3/4, AE1/AE3, CD30, Glypican3
48
Q
A
Seminoma with STGCs
- 10-20% have recognizable STCs
- HCG positive cells up to 25%
- May be surrounded by hemorrhage: Don’t confuse with choriocarcinoma
- Associated with elevated serum HCG level
- Not have a poorer prognosis
- Other giant cells: Langhans GC associated with inflammatory reaction
- Intratubular trophoblasts- 5 of 29 seminomas
49
Q
Diagnosis?
Age?
Stains?
A
YOLK SAC TUMOR
- Most common testicular germ cell of childhood
- Variety of growth patterns: microcystic/reticular, festoon/SchillerDuvall, polyvesicular vitelline, enteric, hepatoid, parietal
- Rare cases of sarcomatous component
- Positve: Glypican 3, SALL4, AE1/AE3
- Negative: OCT3/4, CD30
50
Q
Germ Cell Tumor IHC
A
Germ Cell Tumor IHC
51
Q
Diagnosis?
Age?
A
TERATOMA
- Second most common testicular germ cell tumor of childhood
- Regarded as somatic differentiation of a non-teratomatous germ cell
- Rare cases of associated somatic malignancy – carcinoma, sarcoma
52
Q
Diagnosis?
Age?
Associations?
Variants?
Stains?
A
SERTOLI CELL TUMOR
- Rare in childhood
- Invariably unilateral except in the setting of Peutz-Jeghers or Carney Complex
- Histologic variants: sclerosing sertoli cell tumor, large cell calcifying sertoli cell tumor
- Immunoreactive for keratin, variably immunoreactive for inhibin/calretinin
53
Q
Diagnosis?
Presentation?
Gross?
Stains?
A
LEYDIG CELL TUMOR
- Often presents with gynecomastia
- Gross: solid yellow nodule
- Histology: crystals of Reinke and/or lipofuschin may be seen
- Immunoreactive for inhibin and calretinin
54
Q
A
Renal Medullary Fibroma
- Benign, usually incidental
- Multiple a/w systemic hypertension
- Gross: Small (< 1-5 cm), well-circumscribed, tan-white nodule in the renal medulla / pyramids
- Histology:
- Stellate fibroblast-like cells
- background of loose or dense collagenous tissue
- entrapped tubules at periphery
- +/- heterotopic bone with marrow
- Positive: Oil Red O, Sudan Black B
- Negative: CD34
56
Q
A
Mixed epithelial and stromal tumor
- Benign
- Perimenopausal women, increased hormones
- Gross: well circumscribed, unencapsulated, in renal pelvis, mean 6 cm, cystic, yellow-tan
- Histology:
- Cystic and solid, mesenchymal and epithelial
- ovarian-type stroma
- embedded epithelial structures (tubules and cysts)
- Cysts often have hobnailed epithelium
- Epithelium+: keratin, EMA, CEA and vimentin
- Stroma+: alpha smooth muscle actin, desmin, vimentin, ER and PR
57
Q
A
Metanephric adenoma
- F > M
- BRAF V600E
- No trisomy 7 and 17
- Gross:
- Single, well circumscribed, non encapsulated, tan-gray-white-yellow, solid / lobulated, mean 5 cm (range 0.3 to 15 cm)
- Large tumors may have secondary cystic or hemorrhagic changes
- Histology:
- Small, uniform, closely packed tubules or papillae in loose stroma
- small cells with minimal cytoplasm, bland nuclei that may overlap, uniform chromatin, glomeruloid bodies and rare mitoses
- +/- hemorrhage, necrosis, calcifications (psammoma bodies) or cysts
- No atypia, no blastema, no / rare mitotic figures, no infiltrative growth and no vascular invasion
- Positive: WT1 (strong / diffuse), CD57 (strong / diffuse), CK7 (focal), AE1 (focal) and vimentin (solid areas), S100
- Negative: AMACR, glycogen, CD56, desmin, NCAM and EMA
58
Q
A
Acquired cystic disease associated RCC
- Dialysis
- M > F
- More aggressive than other ESRD related RCC
- No trisomy 7 and 17
- Histology:
- Microcystic sieve-like, abundant eosinophilic cytoplasm
- grade 3 nuclei
- intratumoral oxalate crystals
59
Q
A
Angiomyolipoma with epithelial cysts
- Histology:
- cystic space lined by cuboidal cells (PAX8+)
- cambium layer under epithelium (ER+)
- thick exterior wall of smooth muscle
- +/- TSC
- Smooth muscle predominant angiomyolipoma
- Same prognosis
62
Q
A
Cowper’s gland
63
Q
A
Prostate clear cell atrophy, cribriform
64
Q
A
Prostate Patterns of atrophy. (a) Simple lobular; (b) Sclerotic; (c) Cystic; (d) Linear or streaming.
65
Q
A
Seminal vesicle
66
Q
A
Prostate basal cell hyperplasia
67
Q
A
Sclerosing adenosis of prostate. (a) H&E appearance showing small glands with thick basement membranes embedded in cellular fibrous stroma. (b) High molecular weight keratin staining (34E12) demonstrating positive basal cells. (c) HHF35 (muscle-specific actin) staining in basal cells indicating myoepithelial metaplasia. (d) S100 positivity in basal cells.
68
Q
A
Verumontanum mucosal gland hyperplasia
69
Q
A
Hyperplasia of mesonephric glands. (a) Low power. Note prostatic glands on right side and mesonephric glands on left. (b) High-power photomicrograph. Note small acini, some of which are cystically dilated and some containing colloid-like secretions.
70
Q
A
Michaelis–Gutmann bodies
- 2 to 10 μm in diameter
- partially digested bacteria accumulate in monocytes or macrophages and lead to the deposition of calcium and iron on residual bacterial glycolipid
- pathognomonic feature of malakoplakia
Malakoplakia
- immunocompromise
- mostly GU
- results from the inadequate killing of bacteria by macrophages or monocytes that exhibit defective phagolysosomal activity
- the Michaelis-Gutmann body, is considered pathognomonic for malakoplakia
77
Q
Testicular Germ Cell Tumors
Type, age, malignancy, genetics?
A
78
Q
A
Germ Cell Neoplasia In Situ (GCNIS)
- Precursor lesion of invasive GCT
- 50% of pts with GCNIS progress to invasive GCT within 5 yrs or longer if orchiectomy is not performed
- Seen in almost all cases of invasive GCT except for spermatocytic tumor and prepubertal teratoma and yolk sac tumor
- Histology:
- Tubules show decreased diameter and thickened tubular walls; microlithiasis
- Atypical cells (2x normal germ cell) with prominent nucleoli and abundant clear cytoplasm scattered along periphery of tubules
- May replace entire tubules (seminoma in-situ): seen in equal frequency adjacent to seminomas & NSGCT, not an intratubular spread, advanced form of GCNIS
81
Q
IHC GCT
A
82
Q
A
Choriocarcinoma
83
Q
A
Spermatocytic Tumor
- FGFR3, HRAS mutations or ampl of 9p (DMRT1)
- Derived from post-pubertal type germ cells: resemble spermatogonia or 1st spermatocytes
- GCN unique to testis. 1-2% of all testis tumors
- Almost always seen in pure form. 3-5 cm size
- Frequent in men over 50 yrs (m: 52-59; 19-92 yrs).
- Bilaterality is higher (9%) than seminoma (2%).
- Painless testicular enlargement.
- Indolent clinical behavior.
- Not associated with GCNIS
- Positive: c-kit, VASA, NY-ESO-1, SAGE1, DMRT1, OCT2, Chk2, MAGE-A4, UTF1, SALL4
- Negative: OCT4, PLAP and other GCT markers
84
Q
Transcription Factors in S and EC
A
Transcription Factors in S and EC
Transcription factor: OCT3/4, NANOG, SOX2, 17
- Seminoma: OCT3/4+, NANOG+, SOX2-, SOX17+, (MAGEC2+)
- EC: OCT3/4+, NANOG+, SOX2+, SOX17-, (MAGEC2-)
95
Q
Clinical presentation?
Gross?
Histologic hallmark?
Stains?
A
Choriocarcinoma
- presents as vaginal bleeding or mets
- Gross: hemorrhagic tumor mass, extensive necrosis
- Histology:
- hallmark: presence of all three trophoblast cell types
- cytotrophoblasts
- intermediate trophoblasts
- syncytiotrophoblasts
- Chorionic villi are absent
- Hemorrhage and necrosis
- Mitotic activity is brisk
- does not make its own blood vessels or tumor stroma –> extensive necrosis
- hallmark: presence of all three trophoblast cell types
- Chemo most effective in chorio arising from complete hydatidiform moles, best prognosis
- Intraplacental choriocarcinomas are usually small and are most commonly identified on gross examination as a blood clot or an area that appears to surround an infarct
- Stains
- trophoblasts: CK+
- Intermediate trophoblasts: hPL+(strong), β-hCG+(weak)
- Syncytiotrophoblasts: hPL+(weak), β-hCG+(strong)
- absence of nuclear β-catenin (normal POC+)
96
Q
What is it?
A
Pauciimmune Crescentic Glomerulonephritis
97
Q
At least 80% of patients with pauciimmune crescentic glomerulonephritis test seropositive for __.
__ has specificity for __ or __ on enzyme-linked immunosorbent assay.
- By definition, in pauciimmune crescentic glomerulonephritis, immunofluorescence reveals __.
- The pathogenesis of pauciimmune crescentic glomerulonephritis involves __ leading to vasculitis and crescentic glomerulonephritis.
A
Pauciimmune Crescentic Glomerulonephritis
- At least 80% of patients with pauciimmune crescentic glomerulonephritis test seropositive for antineutrophilic cytoplasmic antibody (ANCA).
- ANCA has specificity for myeloperoxidase (MPO-ANCA) or proteinase 3 (PR3-ANCA) on enzyme-linked immunosorbent assay.
- By definition, in pauciimmune crescentic glomerulonephritis, immunofluorescence reveals minimal to absent positivity for immunoglobulins and complement.
- The pathogenesis of pauciimmune crescentic glomerulonephritis involves ANCA-mediated neutrophil activation, causing neutrophil degranulation on endothelial surfaces and leading to vasculitis and crescentic glomerulonephritis.
98
Q
Alternative causes of crescentic glomerulonephritis include:
- __, which shows __
- immune complex–mediated forms of crescentic glomerulonephritis (e.g., __), which show __on immunofluorescence and electron
A
Pauciimmune Crescentic Glomerulonephritis
• Alternative causes of crescentic glomerulonephritis include
- anti-glomerular basement membrane (GBM) disease, which shows linearstaining for IgG, kappa, and lambda along the GBM
- immune complex–mediated forms of crescentic glomerulonephritis (e.g., lupus nephritis (LN) and IgA nephropathy), which show granular deposits of immunoglobulins and complement on immunofluorescence and electron microscopy.
99
Q
On testicular surface….
Most common tumor of the epidymis?
Treatment?
Age?
Cell of origin?
Gross?
Histology?
Stains?
A
Adenomatoid tumor situated on the testicular surface
- benign neoplasm, curable by local resection
- mesothelial cell origin
- can present in any age group from adolescence to senescence
- most common tumor of the epididymis and can also occur in the spermatic cord and paratestes
- Grossly they are often firm white well-circumscribed nodules
- Histology can vary
- some lesions containing spaces resembling vascular channels, and others having more glandular or tubular structures suggesting an epithelial neoplasm
- sometimes, signet ringlike cells are present, simulated by the presence of cytoplasmic vacuoles
- cells have abundant eosinophilic cytoplasm and the nuclei are small with occasional inconspicuous nucleoli
- can be infiltrative microscopically and are present in a fibrotic background
- some are associated with abundant smooth muscle; these are known as adenomatoid leiomyomas
- muscle cells will be positive for smooth muscle actin (SMA), but not the cells lining the channels and spaces
- Positive: calretinin and epithelial markers, such as AE1AE3, epithelial membrane antigen (EMA), Cam5.2, CK5/6, and CK7
- Negative: CD31 and CD34
- In difficult cases, in which the differential diagnosis is metastatic adenocarcinoma, a panel to include markers that are positive in carcinoma and not in mesothelial proliferation may include carcinoembryonic antigen (CEA), factor VIII-related antigen, HBME-1,MOC31, BER-EP4, B72.3, and CD15.
101
Q
What is the most common renal tumor in newborns?
3 types?
mutation?
Tx?
A
Mesoblastic nephroma
- Congenital mesoblastic nephroma is the most common renal tumor in newborns.
- Microscopically, it is divided into three subtypes:
(1) Classic: less common, resembles infantile fibromatosis or leiomyoma with fascicles and whorls of bland spindled myofibroblasts and thin collagen fibers; tumor surrounds tubules and glomeruli, has irregular borders; chondroid metaplasia / dysplasia of the entrapped tubules is common; mitoses are rare; necrosis / desmoplasia are not present
(2) Cellular: resembles infantile fibrosarcoma with a sheet-like proliferation of plump, atypical spindle cells with abundant cytoplasm, vesicular nuclei and nucleoli; frequent mitotic figures (25-30 / 10 HPF) and necrosis; the tumor has a pushing border
* t(12;15), which results in ETV6-NTRK3 gene fusion, which is similar to the translocation seen in infantile fibromatosis
(3) the mixed subtype, which is a combination of both types
• Most cases, including the cellular variant, are cured by surgical excision.
102
Q
A
Ileal urine
- These degenerated cells with pyknotic nuclei resemble histiocytes, but are degenerated ileal glandular epithelial cells in ileal urine. They usually lack a columnar appearance because epithelial cells tend to “round up” in fluid, and they frequently resemble macrophages.
- Ileal urine commonly has a granular background containing bacteria, cellular debris, and inflammatory cells. This background debris may make it difficult to identify neoplastic cells from a recurrent or metachronous tumor; however, the malignant cells actually may be better preserved than the degenerated intestinal cells, and will show cytologic features characteristic of malignant urothelial cells.
- Cytologic changes due to radiation of urothelium are similar to its effects on other types of epithelial cells; features include marked cell enlargement (cytomegaly; enlargement of both the nucleus and the cell itself), vacuolization of the cytoplasmic and nucleus, “smudged” nuclei, and polychromatic or two-tone cytoplasmic staining.
- Radiation changes may persist for years following treatment. Examination of voided urine is not a primary method of diagnosing prostatic diseases. In fact, it is very uncommon to find normal prostatic cells or evidence of benign disorders of the prostate in voided urine.
- Neutrophils, lymphocytes, and histiocytes almost always are present in ileal urine specimens and do not necessarily indicate an infectious process.
103
Q
A
Thin Basement Membrane Nephropathy
- The clinical presentation of microscopic hematuria, in the absence of significant proteinuria or renal insufficiency, is most commonly encountered in the following three renal conditions: thin basement membrane nephropathy (TBMN), hereditary nephritis (i.e., Alport syndrome), and IgA nephropathy.
- Before a patient with microscopic hematuria undergoes renal biopsy, possible urologic causes for hematuria must be excluded.
- The glomeruli in TBMN usually appear unremarkable on light microscopy. The normal glomerular basement membrane (GBM) thickness averages approximately 320 nm in women and 350 nm in men. Diagnostic criteria for TBMN are diffuse GBM thinning, with mean thickness less than 225 nm in women and less than 250 nm in men.
- The main clinical finding in TBMN is isolated microscopic hematuria. Many patients have a family history of isolated hematuria with autosomal dominant transmission.
- TBMN results from a heterozygous mutation in either COL4A3 or COL4A4; these genes encode the alpha-3 (COL4A3) and alpha-4 (COL4A4) chains of collagen IV.
- TBMN is a nonprogressive condition that is often referred to clinically as benign essential hematuria.
104
Q
Dx?
Weight
Timeline?
Deficiency in?
Tx?
Complications of Tx?
A
Hyaline membrane disease
- Hyaline membrane disease (HMD) is most commonly seen in white male infants weighing less than 2500 grams.
- Besides prematurity, other predisposing conditions include maternal diabetes, twin gestation, and caesarean section without trial of labor.
- Hyaline membranes form in about 2 to 3 hours after onset of respiratory distress (won’t be seen in stillborns or in infants who died within an hour of birth).
- HMD is caused by deficiency in surfactant protein B, caused either by prematurity or genetic mutation.
- Bronchopulmonary dysplasia (chronic lung disease of infancy) is a complication of the treatment of HMD.
- Exogenous surfactant administration significantly improves morbidity and mortality
