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Following penicillin Tx for pneumococcal pneumonia,a pt develops a palpable purpuric rash.Biopsy of the rash demonstrates vasculitis with hemorrhage into the skin.The involved artererioles n venules show fibrinoid necrosis n aneutrophilic Infiltrate into the wall.many of the neutrophil r fragmented.Diagnosis.
A.Allergic angiomatosis n angiitis
B.Giant cell arteritis
C.leucocytoclastic angiitis
D.polyarteritis nododsa
E>wegener's granulomatosis

C.

Palpable purpura = small vessel immune complex disease (thanks, goljan!)

beta-lactams are known to cause leucocytoclastic angiitis.

Thanks Goljan n goober
u r right