title: Muscle biopsy in the evaluation of pyrexia of unknown origin (PUO).
mesh_terms: D000328:Adult; D001706:Biopsy; D005335:Fever of Unknown Origin / Q000209:etiology* / Q000473:pathology; D006801:Humans; D008297:Male; D009132:Muscles / Q000473:pathology*; D010488:Polyarteritis Nodosa / Q000150:complications* / Q000473:pathology