In PAN, cysts are seen in all except

Polyaeritis nodosa (PAN) is a systemic vasculitis of small or medium-sized muscular aeries that typically involves the renal and visceral vessels and spares the pulmonary circulation. Classic PAN is a segmental transmural necrotizing inflammation of small to medium-sized aeries, often with superimposed thrombosis. Kidney, hea, liver, and gastrointestinal tract vessels are affected in descending order of frequency. Robbins Basic pathology,9th edition,pg no.352