System PE ID findings Noninfectious mimics Diagnostic features
- Septic cavernous
sinus thrombosis—
III, IV, V, and VI - Cryptococcal
meningitis - Herpes meningo-
encephalitis - CMV mononucleosis
- Syphilis—VII and
VIII, followed by
II, III, IV, VI, V - Acute botulism—
III, IV, VI, IX, X,
XI, XII (with a
fixed dilated pupil) - Tuberculous
meningitis—VI,
VII, VIII - Primary amebic
meningoencephalitis - Mumps
- Eastern equine
encephalitis—VI,
VII, XII - Bulbar
poliomyelitis—IX, X - Diphtheria—III, VI,
VII, IX, and X - Tick borne
encephalitis—III,
VII, IX, X, and XI - Progressive
multifocal leuko-
encephalopathy - Listerial brainstem
encephalitis
(rhombencephalitis) - St. Louis
encephalitis - Japanese
encephalitis - Cerebral
cysticercosis - Subacute progres-
sive
disseminated
histoplasmosis - Cephalic tetanus
(following a head
wound) - Relapsing fever
- Q fever
- Psittacosis
- Eosinophilic
meningitis
(Angiostrongylus
cantonensis)—
IV, VI - Melioidosis—VII
62 Mishriki