title: Gluteal muscular and sciatic nerve metastases in advanced urinary bladder carcinoma: case report.
abstract: We present a case of gluteal muscular and sciatic nerve metastases from urinary bladder carcinoma. T2-weighted magnetic resonance images demonstrated diffuse swelling and an increase in the signal of the right gluteus maximus muscle without destruction of the original arrangement of muscular fibers. Further, remarkable thickening of the right sciatic nerve showing a relatively hypointense signal was detected. Postcontrast T1-weighted images showed strong enhancement of these structures. Fine-needle aspiration biopsy with ultrasonographic guidance confirmed metastatic carcinoma cells in the right gluteal muscle and the sciatic nerve. These radiologic findings may represent a rare pattern of metastasis from urinary bladder carcinoma.
authors.affiliation: Department of Clinical Radiology, Kyushu University Graduate School of Medical Sciences, 3-1-1 Maidashi, Higashi-ku Fukuoka 812-8582, Japan.
authors.forename: E
authors.initials: E
authors.lastname: Nagao
authors.forename: A
authors.initials: A
authors.lastname: Nishie
authors.forename: K
authors.initials: K
authors.lastname: Yoshimitsu
authors.forename: H
authors.initials: H
authors.lastname: Irie
authors.forename: Y
authors.initials: Y
authors.lastname: Shioyama
authors.forename: S
authors.initials: S
authors.lastname: Naito
authors.forename: S
authors.initials: S
authors.lastname: Matsuura
authors.forename: H
authors.initials: H
authors.lastname: Honda
mesh_terms: D000230:Adenocarcinoma / Q000175:diagnosis / Q000556:secondary*; D002081:Buttocks / Q000473:pathology; D006801:Humans; D008297:Male; D008875:Middle Aged; D019042:Muscle Neoplasms / Q000175:diagnosis / Q000556:secondary*; D018482:Muscle, Skeletal / Q000473:pathology*; D009362:Neoplasm Metastasis; D010524:Peripheral Nervous System Neoplasms / Q000175:diagnosis / Q000556:secondary*; D020426:Sciatic Neuropathy / Q000175:diagnosis / Q000473:pathology*; D001749:Urinary Bladder Neoplasms / Q000175:diagnosis / Q000473:pathology*