RT Journal Article SR Electronic T1 Extraskeletal osteosarcoma, telangiectatic variant arising from the small bowel mesentery JF Saudi Medical Journal JO Saudi Med J FD Prince Sultan Military Medical City SP 958 OP 961 VO 32 IS 9 A1 Hussain, Muhammad I. A1 Al-Akeely, Mohammed H. A1 Alam, Mohammed K. A1 Jasser, Nayel A. YR 2011 UL http://smj.org.sa/content/32/9/958.abstract AB Extraskeletal osteosarcoma (EOS) is a highly aggressive and rare malignant soft tissue tumor, characterized by the production of neoplastic osseous tissue without attachment to the bone or periosteum. It rarely involves the visceral organs. Only 3 cases of mesenteric EOS have been reported in English literature. Here, we describe a male patient of 40 years, who was diagnosed to have EOS arising from small bowel mesentery. This patient presented with lower gastrointestinal (GI) bleeding. Upper GI endoscopy and colonoscopy were normal. Computed tomography scan demonstrated a well defined multiloculated mixed density mass lesion measuring about 13x7x7 cm in lower abdomen adjacent to small bowel loops with liver metastasis. Palliative en bloc resection of tumor with adjacent small bowel was performed. The histopathology revealed a telangiectatic type osteosarcoma of mesentery. Diagnosis of EOS, its management and the outcome in context of the current literature are discussed.