Neuro Flashcards

1
Q

Neurocysticercosis

A

Vesicular
Colloidal vesicular
Granular nodular
Nodular calcified

Vegans can’t get neurocysticercosis

Usually involve grey white matter junction

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2
Q

Double rim sign

A

Cerebral abscess
Seen on SWI/T2 low signal outer rim, high signal inner rim
Not seen on GBM

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3
Q

TORCH Infections

A

Congenital CNS infections
Toxoplasmosis
Other (syphilis, varicella zoster, parvovirus B19)
Rubella
CMV - most common
HSV

Ventriculomegaly, periventricular calcification

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4
Q

Sub ependymoma

A

Older age group compared to ependymoma
Can look similar but minimal emhancement
Benign and slow growing

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5
Q

Chorus Plexus Papilloma

A

Benign uncommon intraventricular tumour
Adults posterior fossa
Paeds lateral ventricles
Marked homogenous enhancement

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6
Q

Rathke Cleft Cyst Pathognomic Feature

A

Cyst with a dot

No internal enhancement

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7
Q

Dural sinus occlusive disease

A

Infective dural sinus thrombosis seen in acute otomastoiditis

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8
Q

Inverted papilloma

A

Non-cancerous sinonasal tumour
Middle aged men
Convoluted cerebriform pattern T2/T1C

Cannot tell confidently tell apart from sinonasal carcinoma on imaging

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9
Q

Aggressive soft tissue mass centred on olfactory region

A

Olfactory neuroblastoma
Sinonasal carcinoma
Menigioma/hammguipericytoma( solitary fibrous tumour of the dura)

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10
Q

Allergic Fungal Sinusitis

A

Opacified expanded sinsuses with hyperdense CT, low T2 balls due to fungal concretions. Hyper intense peripheral tissues.

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11
Q

Branchial Cleft Cyst

A

Cystic dilation of remnant of clefts

2nd: below angle of mandible, anterior to SCM muscle

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12
Q

Malignant Salivary Gland Tumours

A

Adenocystic carcinoma
Mucoepidermoid carcinoma

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13
Q

Benign Salivary Gland Tumours

A

Pleomorphic adenoma
Warthin Tumour

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14
Q

Odontogenic Meaning

A

Relating to tissue that is involved in the formation of teeth

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15
Q

Dentigerous Cysts

A

Benign non-inflammatory odontogenic cysts well defined lucency surrounding an unerrupted crown of an unerrupted tooth.

Slightly older population than OKCs as occur with secondary dentition

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16
Q

Radiolucent lesions of the mandible

A

Odontogenic vs Non-Odontogenic

O:
Periapical Cyst
Periapical abscess
Dentigerous Cyst
Odontogenic Keratocysts (Gorlin Goltz)
Ameloblastoma

Non-O:
Fibrous dysplasia, mets, myeloma, ABC, simple cyst

17
Q

-melic

A

Related to a limb

18
Q

Fibrous Dyslasia Syndromes

A

McCune-Albright: polyostotic FD, precocious puberty, cafe au lait spots
Mazabraud: FD, intramuscular myxomas

19
Q

Wharton’s Duct

A

Sub-mandibular duct

20
Q

Stenson’s Duct

A

Parotid duct

21
Q

Laryngocoele

A

Air filled cystic lesion in paraglottic space in continuity with laryngeal ventricle

22
Q

Blood in middle ear

A

Haemotympanum

23
Q

Intraconal lesions sparing optic nerve

A

Cavernous haemangioma
Lymphatic malformation
Orbital lymphoma

24
Q

Intraconal lesions involving the nerve

A

Optic nerve glioma
Optic nerve meningioma
Optic neuritis
Pseudo tumour
Lymphoma

25
Lacrimal Gland Masses
Inflamm: Sarcoid Pseudotumour Sjogren Neoplastic: Pleomorphic adenoma Adenoid cystic carcinoma
26
Sjogren Syndrome
AI condition of the exocrine lacrimal and salivary glands associated Salt and pepper appearance on MRI
27
Globe calcification
Retinal: retinalblastoma Coats: small globe, retinal detachment with exudates
28
Colpocephaly
Enlargement of the occipital horns Associated with agenesis of the corpus callosum
29
Osteoporosis Circumscripta (Cranii)
Discrete radiolucent regions of the skull. Often seen in the context of lyric phase of pager’s disease but may be seen in other conditions e.g. hyperparathyroidism