title: A Low-Grade Fibromyxoid Sarcoma of the Internal Abdominal Oblique Muscle.
abstract: A low-grade fibromyxoid sarcoma (LGFMS) is a rare tumor, with a benign histologic appearance but malignant behavior. This report describes a 74-year-old man with an internal abdominal oblique muscle mass. The tumor appeared as a well-defined ovoid mass on computed tomography, with mild uptake on fluorine-18-fluorodeoxyglucose positron-emission tomography images. Radical resection with wide safe margins was performed. Histologically, the tumor was composed of spindle-shaped cells in a whorled growth pattern, with alternating fibrous and myxoid stroma. MUC4 expression, a highly sensitive and specific immunohistochemical marker for LGFMS, was detected. Therefore, we diagnosed the tumor as LGFMS. At the 3-month follow-up, there was no sign of recurrence or metastasis. We report the first case of LGFMS arising from the internal abdominal oblique muscle.
authors.affiliation: Department of Surgery, Chuden Hospital, 3-4-27 Otemachi, Naka-Ku, Hiroshima 730-8562, Japan.
authors.forename: Masakazu
authors.initials: M
authors.lastname: Hashimoto
authors.affiliation: Department of Surgery, Chuden Hospital, 3-4-27 Otemachi, Naka-Ku, Hiroshima 730-8562, Japan.
authors.forename: Kei
authors.initials: K
authors.lastname: Koide
authors.affiliation: Department of Surgery, Chuden Hospital, 3-4-27 Otemachi, Naka-Ku, Hiroshima 730-8562, Japan.
authors.forename: Michinori
authors.initials: M
authors.lastname: Arita
authors.affiliation: Department of Surgery, Chuden Hospital, 3-4-27 Otemachi, Naka-Ku, Hiroshima 730-8562, Japan.
authors.forename: Koji
authors.initials: K
authors.lastname: Kawaguchi
authors.affiliation: Department of Surgery, Chuden Hospital, 3-4-27 Otemachi, Naka-Ku, Hiroshima 730-8562, Japan.
authors.forename: Yoshihiro
authors.initials: Y
authors.lastname: Mikuriya
authors.affiliation: Department of Diagnostic Pathology, Kochi Health Sciences Center, 2125-1 Ike, Kochi 781-8555, Japan.
authors.forename: Jun
authors.initials: J
authors.lastname: Iwata
authors.affiliation: Department of Pathology, Chuden Hospital, 3-4-27 Otemachi, Naka-Ku, Hiroshima 730-8562, Japan.
authors.forename: Toshiyuki
authors.initials: T
authors.lastname: Iwamoto