USMLE Histology and Molecular Biology Mnemonics
N. MeninGitidiS has M, G and S in spelling - hence ferments all three sugars - Maltose, Glucose and Sucrose , whereas N. Gonorrhoea has only G - ferments only Glucose
Viruses that have multiple segments of RNA ! : ARBO viruses
A - Arena [2]
R - Reo [10] and Retro [2]
B - Bunya [3]
O - Orthomyxo [8]
Dont confuse these with ARthropod BOrne ones
None of the DNA viruses have a segmented genome
In order to memorize the layers of the lymph nodes and their cellular content , here is this mnemonic :
Bush Found The Pomp (not Bomb) , PLease Call Military Soldiers
The explaining :
Bush Found = B cells in Follicle
The Pomp = T cells in Paracortex
PLease Call = Plasma cells in Cords of Medulla
Military Soldiers = Macrophages in Sinuses of Medulla
one more thing , this sequence is from OUTSIDE to INSIDE, i.e. the most outside layer is Follicle, and the most inside is Sinuses of Medulla.
In STEP 1 they ask about the layer which is not developed in these diseases :
DiGeorge = Paracortex (no T cells)
Brutton`s Disease = Follicles (no B cells)
SCID = Follicles, Paracortex and Cords (no B cells, no T cells, and of course no PLasma cells)
riplet Repeats:
Huntingtons: CAG
(hunter puts animal in a CAGe or Caudate Atrophy Gene)
Myotonic Dystrophy: CTG
-Can’t Tap, and Go
or C- Cardiac arrhythmias and Cataracs
T- Testicular Atrophy
G- Gets worse with generations (Anticipation)
Fragile X: CGG
Congenital Gigantic Gonads (testicular hypertrophy)
Fredrich’s Ataxia: GAA
(can’t think of anything for that one)
Skin layers from deep to sureficial:
Baby Skin Looks Good Condition.
Basal;Spinosa;Lucida;Granulosa;Corneum .






















