Condition	Characteristics
Disseminated gonococcal infection	Erythematous macules evolving to tender hemorrhagic pustules or necrotic papules; usually near small joints of hands and feet; fever, asymmetric arthralgias, tenosynovitis, and arthritis are common.
Hypersensitivity vasculitis	Palpable purpura; may convert to hemorrhagic blisters, necrosis, ulcers in severe cases; found on lower legs, ankles, buttocks, arms; usually drug induced or post-infectious.
Infective endocarditis	Nonpainful, erythematous or hemorrhagic macules or nodules found on palms or soles (Janeway lesions); tender, purple, subcutaneous nodules in the pulp of fingers/toes (Osler's nodes); heart murmurusually present.
Korean hemorrhagic fever	Mucocutaneous petechiae, ecchymosis; fever, myalgia, headache, thrombocytopenia, renal involvement common; infectious etiology (Hantavirus).
Meningococcemia	Discrete pink macules/papules/petechiae; fulminant cases may include purpura, ecchymosis, necrosis, disseminated intravascular coagulation; highest incidence in children.
Reiter's syndrome	Red to brown papules, vesicles, or macules on soles or palms (keratoderma blennorrhagicum); lesions may become pustular, hyperkeratotic, crusted. Other findings include arthritis, uveitis, stomatitis, circinate balanitis.
Sweet's syndrome	Red to red-brown painful plaques and nodules; found on head, neck, upper extremities; fever, neutrophilia present; generally idiopathic or post-infectious; may indicate underlying malignancy.