An exanthem is a skin eruption occurring as a symptom of a general disease, usually an infectious process. The following tables list several clinical differential diagnoses that should be considered when encountering a patient with these symptoms.
EXANTHEMATOUS ILLNESSES WITH PETECHIAE
SKIN PETECHIAE (EXANTHEM) Enterovirus
Gonococcemia (pustules more common)
Rocky Mountain spotted fever
Rat bite fever
ORAL MUCOSAL PETECHIAE (ENANTHEM) GABHS
RASH INVOLVING THE HANDS AND FEET
BACTERIAL Rocky Mountain Spotted Fever VIRAL Hand-Foot-Mouth disease
Papular-purpuric gloves and socks syndrome (Parvovirus B19 infection)
OTHER Kawasaki's disease NON-INFECTIOUS Erythema multiforme
PHARYNGITIS AND RASH IN YOUNG ADULTS
Fitzpatrick's Dermatology in General Medicine. Fifth Edition. McGraw-Hill. 1999.
Last Updated 1/1/2001
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