Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
3 Cards in this Set
- Front
- Back
|
Cerebral peripheral/ring enhancing lesions and how to differentiate |
Infection: cerebral abscess , tuberculosis, neurocysticercosis Malignancy: Mets, glioblastima, Leukaemia, lymphoma(in immunocompromised), Vascular: subacute infarct/hemorrhage/contusion; thrombosed aneurysm, Post -operative Degenerative: demyelination, tumefactive demyelinating lesion Necrosis: radiation necrosis, necrotising leukoencephalopathy after methotrexate
Rules of thumb: a.Enhancing wall traits: thick+nodular (neo), thin+regular (abscess), incomplete ring open towards cortex(demyelination); intermediate to low T2 signal(abscess), restricted diffusion(GBM/demyelination) b. Surrounding edema: extensive edema relative to lesion size (abscess), increased perfusion(neo) c. Central fluid content: restricted diffusion(abscess), absence of diffusion restriction (tumor) d. Number of lesions: similar sized at GW junction (meta/abscess), small<1-2am,thin wall (neurocyst), irregular mass with adjacent secondary lesions in the same region of edema (GBM) |
|
|
Ddx of multiple hypoattenuating irregular liver lesions |
Mets, abscesses(bacterial if many, amoebic if solitary, fungal usually due to biliary obstruction, diverticulitis, appendicitis )haemangiomas, simple liver cysts (Differentiate based on clinical and HU) |
|
|
Complications of pancreatitis |
Pseudocysts, abscesses, necrosis, thrombosis of splenic /portal veins, pseudo aneurysms+/- haemorrhage |
