title: Prolonged postoperative fever caused by a perinephric abscess: diagnosis by "Mathe's sign".
mesh_terms: D000038:Abscess / Q000150:complications* / Q000175:diagnosis; D000671:Amputation, Surgical; D005334:Fever / Q000209:etiology*; D006801:Humans; D007668:Kidney / Q000000981:diagnostic imaging*; D008297:Male; D008875:Middle Aged; D010996:Pleural Effusion / Q000209:etiology; D011183:Postoperative Complications; D012008:Recurrence; D012119:Respiration; D012187:Retroperitoneal Space; D014567:Urography