|B.||Mönckeberg medial sclerosis|
Ans.D. Polyarteritis nodosa
The histology picture illustrates polyarteritis nodosa.
It is an acute necrotizing vasculitis that affects medium-sized and smaller muscular arteries. On occasion, it extends into larger arteries, such as the renal, splenic, or coronary arteries.
The most common morphologic feature of affected arteries is fibrinoid necrosis, in which the medial muscle and adjacent tissue are fused into an eosinophilic mass that stains for fibrin. PAN affecting small vessels is frequently associated with the presence of P-ANCA.
Approximately 15% of patients with PAN demonstrate either HBsAg or anti-HCV antibodies.
The immune complexes seen in Henoch-Schönlein purpura (choice C) are unrelated to hepatitis B.