title: Large solitary fibrous tumor of the retroperitoneum: report of a case.
abstract: We report an unusual case of a large solitary fibrous tumor (SFT) in the retroperitoneum. A 53-year-old man was referred to our hospital for surgical treatment of a swelling in the right flank with dull pain. Abdominal computed tomography (CT) and echograms showed a large encapsulated tumor compressing the right kidney and liver. At laparotomy, the tumor was found to be encapsulated but fixed to the capsule of the right kidney within a small area. Therefore, complete removal was achieved. The resected specimen was an encapsulated elastic hard tumor, 14 x 13 x 10 cm in size. Immunohistochemical studies revealed reactivity for CD34 and vimentin, but no staining for keratin, S-100, or alpha-smooth muscle actin, confirming a diagnosis of SFT. Although SFT is usually associated with a favorable prognosis, close follow-up is recommended because of the limited information on its long-term behavior.
authors.affiliation: Second Department of Surgery, Gifu University School of Medicine, 40 Tsukasa-machi, Gifu 502-8705, Japan.
authors.forename: Katsuyuki
authors.initials: K
authors.lastname: Kunieda
authors.forename: Yoshihiro
authors.initials: Y
authors.lastname: Tanaka
authors.forename: Narutoshi
authors.initials: N
authors.lastname: Nagao
authors.forename: Kazuya
authors.initials: K
authors.lastname: Yamaguchi
authors.forename: Jun
authors.initials: J
authors.lastname: Sano
authors.forename: Shinji
authors.initials: S
authors.lastname: Osada
authors.forename: Shigetoyo
authors.initials: S
authors.lastname: Saji
authors.forename: Kuniyasu
authors.initials: K
authors.lastname: Shimokawa
mesh_terms: D003937:Diagnosis, Differential; D017809:Fatal Outcome; D006801:Humans; D008297:Male; D008875:Middle Aged; D018218:Neoplasms, Fibrous Tissue / Q000175:diagnosis* / Q000473:pathology / Q000601:surgery; D012186:Retroperitoneal Neoplasms / Q000175:diagnosis* / Q000473:pathology / Q000601:surgery; D014057:Tomography, X-Ray Computed