title: Primary extraskeletal osteosarcoma of omentum majus.
abstract: Extraskeletal osteosarcoma is a rare malignant soft tissue tumor. Here we present a case of a primary extraskeletal osteosarcoma arising from omentum majus in a 40-year-old Chinese woman. Ultrasonography of the pelvic cavity showed a large soft tissue mass with marked calcification. Complete surgical resection of the primary tumor was performed and the histopathological diagnosis was extraskeletal osteosarcoma of omentum majus. She was followed up without adjuvant radiotherapy and chemotherapy, and died from widespread intra-abdominal, lung and liver metastases 7 months postoperatively.
authors.affiliation: Department of Surgery, Shaoxing County Center Hospital, Shaoxing, Zhejiang Province, PR China. helaine@126.com.
authors.forename: Shui-Xiang
authors.initials: SX
authors.lastname: Tao
authors.forename: Guo-Qin
authors.initials: GQ
authors.lastname: Tian
authors.forename: Meng-Hua
authors.initials: MH
authors.lastname: Ge
authors.forename: Cheng-Long
authors.initials: CL
authors.lastname: Fan
mesh_terms: D000328:Adult; D001859:Bone Neoplasms / Q000175:diagnosis* / Q000601:surgery; D002114:Calcinosis / Q000175:diagnosis; D017809:Fatal Outcome; D005260:Female; D006801:Humans; D009852:Omentum; D012516:Osteosarcoma / Q000175:diagnosis* / Q000601:surgery; D012983:Soft Tissue Neoplasms / Q000175:diagnosis* / Q000601:surgery; D014057:Tomography, X-Ray Computed; D016896:Treatment Outcome