CtC pearls Flashcards by Lane Stafford

West Nile classic look

T2 bright BG with corresponding restricted diffusion

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CJD classix

Gyriform peripheral restricted diffusion

Restricted diffusion in dorsal medial thalamus (hockey stick)

Rapidly progressing atrophy

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neurocysticercosis stages

Vesicular - thin walled, no edema

Colloidal - hyperdense cyst with lots of edema

Granular - shrinking, less edema

Nodular - small, calcified, no edema

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ganglioglioma classic look

cystic and solid with focal calcs (enhances)

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Gorlin

medullos

thick dural calcs

odontogenic cysts

basal cell ca after radiation

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Central neurocytoma classic look

MC IV mass in adults 20-40

swiss cheese - numerous cystic spaces on T2

Calcify, a lot

cystic non-enhancing intraventricular mass in a grown up

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CPP

a/w syndrome

trigone (only seen in kids)

Li Fraumeni (p53)

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DIG

< 1 yo

large cyst, superficial cortex

“rapidly increasing head circumference”

solid components enhance avidly

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microadenoma adeno vs neurohypophysis

2/3 in adeno

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Germinomas boys vs girls

germinomas

boys pineal

girls suprasellar

heterogenous T1/T2, fat and calcs, heterogenous enhancement

GERMINOMA CENTRAL CALCS

BLASTOMA AND CYTOMA EXPLODED CALCS

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mucocele look

T1 bright with thin enhancing rim

(Frontal MC)

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stroke enhancement timing

starts in 3 days

peaks at 3 weeks

gone by 3 months

RD 30 mins to 2 weeks

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capillary telangiectasia

usually pons

usually 2/2 RT

slow flow

don’t bleed

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MC systemic itis to hit CNS

PAN

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MC collagen vasc dz to hit CNS

SLE

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Moya a/w’s

Sickle

Downs

XRT

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MR Spect randomness

Lactate Lipid

lactate when

Myoinositol

Alanine

Glutamine

High grade tumor

Low grade tumor

Radiation necrosis

Lactate Lipid - double peak

Myoinositol - Alzheimers and low grade glioma

Alanine - Mening

Glutamine - hepatic encephalopathy

High grade tumor - high chol/NAA, lactate/lipids up

Low grade tumor - choline and NAA down

Radiation necrosis - choline and NAA down, lactate up

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gradenigo triad

Otomastoiditis

Tic

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endolymphatic sac tumor

a/w

look

VHL

amorphous calcs on CT

T2 bright with intense enhancement

vascular with flow voids and blush on angio

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retro fenestral

more severe

demineralization around cochlea

component of sensory hearing loss

almost always bilateral and symmetric

cholesteatoma path of destruction

scutum

ossicles (long process of incus)

lateral segment of ss canal

Big maxillary ostium

antrochoanal polyp

inverted papilloma

similar looking to antrochoanal with enhancement

10% hide SCC

cerebriform appearance

esthesio nucs positive?

octreotide

nosebleed culprit

sphenopalatine

MC sialolithiasis

submandibular (wharton)

odontogenic keratocyst look a/w

Body/ramus no cortical expansion likely shown multilocular **Gorlin syndrome**

aggressive looking jaw lesion

ameloblastoma/adamantinoma of the jaw solid component tend to arise from dentigenous cysts DOES expand soap bubbles extensive tooth resorption

odontoma

tooth hamartoma starts out lucent, will be shown solid MC odontogenic tumor of mandible

MC malig tumor of minor salivary glands

mucoepidermoid carcinoma variable appearance

Warthins

like parotid tail **a/w smoking** well defined with cystic changes and **mural nodule** **takes up pertechnetate on NUCS**

adenoid cystic salivary

malignant, favors small salivary glands (all the malignant ones do) ## Footnote **PERINEURAL SPREAD, INVASIVE VII**

parotid lymphoma

**bilateral = Sjogrens** **sjogrens = 1000x the risk (MALT lymphoma)**

best laryngeal SCC outcome?

glottic

T3 laryngeal SCC = ?

fixation of chords paraglottic space involvement, "transglottic", seen on coronal

Small eye with dense vitreous

Persistent hyperplastic primary vitreous failure of embryonic ocular blood supply to regress

Coat's dz what is? vs Rb?

Retinal telangiectasis, leaky blood and subretinal exudate ## Footnote **Unilateral small eye, not calcified** **Rb normal sized and calcified**

Weird breast cancer met to eye feature?

enopthalmos

MC intra-ocular lesion in an adult and next step?

orbital melanoma Liver MR (mets there)

orbital septum origin and insertion

originates from periosteum of the orbit, inserts in the palpebral tissue along the tarsal plate

Modic 1 2 3

1 = edema T2 bright 2 = fat both bright 3 = scar both dark

plavix myelogram

7 days coumadin 4-5 ASA ok LMW hep x 12 hours heparin 2-4 hours

time for abnormal nerveroot enhancement

after 6 weeks = arachnoiditis

transvers lig

straps dens to anterior C1 arch arch to dens should be \<5mm

spinal avm/avf types 1-4

**1 MC, dural AVF, single coiled vessel** **2 has an intramedullary nidus, bleeds** **3 juvenile**, bad **4 near the conus**, perimedullary

rugger jersey or picture frame that's T1 and T2 dark on MR?

**Ostepetrosis**

TM look

long segment both sides of cord expanded and swollen can enhance MS is short seg, non expanding, focal

NF vs schwannoma

NF has T2 dark center, target schwannoma may have cyst or hemorrhage