(medicine) A delayed relapse of epidemic typhus (caused by Rickettsia prowazekii), occurring some time after the original infection, characterized by symptoms similar to or even identical to the original attack of typhus, including a maculopapular rash.

(medicine) Any of a group of fatal inherited metabolic disorders associated with sphingomyelin accumulation in the central nervous system.

(medicine) polyostotic sclerosing histiocytosis, a rare disease characterized by the abnormal multiplication of histiocytes.

(medicine) A relatively benign disease, characterized by swollen lymph nodes, caused by the bacterium Bartonella henselae normally carried by the cat flea Ctenocephalides felis

a tick-borne viral hemorrhagic fever endemic to South Asia.

A neurological disease with paralysis and dementia, associated with the US territory of Guam.

gout

familial benign pemphigus, a genetic disorder that causes blisters on the skin

(medicine, dated) Langerhans cell histiocytosis

(medicine) dysplastic gangliocytoma of the cerebellum