title: Rectal biopsy as a diagnostic aid in periarteritis nodosa.
mesh_terms: D000328:Adult; D000368:Aged; D001706:Biopsy; D006801:Humans; D007668:Kidney / Q000473:pathology; D008297:Male; D010488:Polyarteritis Nodosa / Q000175:diagnosis* / Q000473:pathology; D012007:Rectum / Q000473:pathology*