A helpful mnemonic is "DR MAGICAL"
No single feature is pathognomonic, although a cystic lesion that markedly restricts centrally (the fluid component) on DWI should be considered an abscess until proven otherwise.
Many features of the lesion as well as clinical presentation and patient demographics need to be taken together to help narrow the differential. Helpful rules of thumb include:
The Acronym P.I.R.A.T.E.S. is sometimes used to remember the causes of atrial fibrillation which include:
Mnemonic for the side effects of Phenytoin
P: Pheripheral Neuropathy, P-450 interactions
E: Enlarged gums
Y: Yellow-browning of skin
O: Osteomalacia (due to enhanced vitamin D metabolism)
I: Interference with folic acid absorption (hence megaloblastic anemia)
N: Neuropathies: vertigo, ataxia, headache
Get More Stuff Like This In Your Inbox