title: [A case of retroperitoneal liposarcoma with inflammatory pseudotumor].
abstract: A 54-year-old man presented with pollakiuria and dysuria. Ultrasonography, computed tomography (CT), and magnetic resonance imaging (MRI) showed a retroperitoneal tumor 10 cm in diameter. Pathological examination of a transrectal biopsy specimen obtained from the patient revealed the presence of an inflammatory myofibroblastic tumor (IMT). The patient underwent surgical resection of the tumor. Histopathologically, the tumor was composed of 3 parts : the largest part was compatible with an inflammatory pseudotumor: the second part, well-differentiated liposarcoma: and the third part, a myxoid liposarcoma. He has been followed up for 14 months ; but there was no evidence of local recurrence of the tumor. We believe that the inflammatory pseudotumor complicated in repairing the inflammation arising from the liposarcoma.
authors.affiliation: The Department of Urology, Tenri Hospital.
authors.forename: Kaoru
authors.initials: K
authors.lastname: Murakami
authors.forename: Noboru
authors.initials: N
authors.lastname: Shibasaki
authors.forename: Akihiro
authors.initials: A
authors.lastname: Hamada
authors.forename: Atsushi
authors.initials: A
authors.lastname: Sengiku
authors.forename: Kosuke
authors.initials: K
authors.lastname: Okasho
authors.forename: Atsuro
authors.initials: A
authors.lastname: Sawada
authors.forename: Hiroaki
authors.initials: H
authors.lastname: Kawanishi
authors.forename: Kazuhiro
authors.initials: K
authors.lastname: Okumura
authors.forename: Hidehiro
authors.initials: H
authors.lastname: Okumura
mesh_terms: D006801:Humans; D008080:Liposarcoma / Q000150:complications* / Q000473:pathology; D008297:Male; D008875:Middle Aged; D011559:Pseudotumor Cerebri / Q000150:complications* / Q000473:pathology; D012186:Retroperitoneal Neoplasms / Q000150:complications* / Q000473:pathology