title: A 40-year-old gossypiboma (foreign body granuloma) mimicking a malignant femoral surface tumor.
abstract: The patient was a 61-year-old man who developed gossypiboma of the left thigh and femur resulting in the imaging appearances of a malignant surface tumor. He had a past history of surgery on the left femur for open fracture 40 years previously. Radiographs and CT showed a soft tissue mass with osteolysis and periosteal thickening of the left femur. On MRI, the mass showed heterogeneous signal intensity with contrast enhancement at the periphery, suggesting a malignancy. 99mTc-HMDP bone scintigraphy showed a faint ring-like uptake, but thallium -201 scintigraphy did not show any uptake in the tumor. An extensive intralesional excision was performed. Postoperative histopathological examination showed a fibrous foreign body with reactive changes. There were neither viable cells nor atypical giant cells around the foreign body. No malignant change was evident. Based on surgical and histopathological examinations, the tumor was finally diagnosed as gossypiboma related to a retained surgical sponge.
authors.affiliation: Department of Orthopaedic Surgery, Ehime University School of Medicine, Shitsukawa, Shigenobu-cho, Onsen-gun, Ehime, Japan. kenshi@m.ehime-u.ac.jp
authors.forename: Kenshi
authors.initials: K
authors.lastname: Sakayama
authors.forename: Taketsugu
authors.initials: T
authors.lastname: Fujibuchi
authors.forename: Yoshifumi
authors.initials: Y
authors.lastname: Sugawara
authors.forename: Teruki
authors.initials: T
authors.lastname: Kidani
authors.forename: Joji
authors.initials: J
authors.lastname: Miyawaki
authors.forename: Haruyasu
authors.initials: H
authors.lastname: Yamamoto
mesh_terms: D003287:Contrast Media / Q000008:administration & dosage; D003937:Diagnosis, Differential; D005266:Femoral Neoplasms / Q000175:diagnosis*; D005269:Femur / Q000000981:diagnostic imaging / Q000473:pathology; D015745:Granuloma, Foreign-Body / Q000175:diagnosis* / Q000601:surgery; D006801:Humans; D007089:Image Enhancement / Q000379:methods; D008279:Magnetic Resonance Imaging / Q000379:methods; D008297:Male; D008875:Middle Aged; D011877:Radionuclide Imaging; D015503:Surgical Sponges / Q000009:adverse effects; D013995:Time; D014057:Tomography, X-Ray Computed / Q000379:methods
chemical_list: D003287:Contrast Media