RT Journal Article SR Electronic T1 Primary extraskeletal mesenchymal chondrosarcoma arising from the iliac vein JF Saudi Medical Journal JO Saudi Med J FD Prince Sultan Military Medical City SP 1058 OP 1061 DO 10.15537/smj.2017.10.20498 VO 38 IS 10 A1 Hua Zhang A1 Shuai Wang A1 Zhihua Cheng A1 Han Liu YR 2017 UL http://smj.org.sa/content/38/10/1058.abstract AB The iliac vein is an extremely rare site for mesenchymal chondrosarcoma, and patients with primary extraskeletal mesenchymal chondrosarcoma arising from a vein always suffer a very poor prognosis. We report a case of a 45-year-old female who presented with a 5-month history of left leg edema in 2015. Contrast-enhanced computed tomography showed a large mass in the left iliac vein with scattered calcifications. Wide-margin resection was performed, and histopathologic and immunohistochemical analyses confirmed the presence of intraluminal mesenchymal chondrosarcoma with local invasion out of the vein wall. Due to poor patient compliance, postoperative neoadjuvant chemotherapy and radiotherapy were not started, and a bone scan performed 16 weeks postoperatively showed multiple bone metastases. The patient died on the twenty-fourth postoperative week.