Abdominal and pelvic CT scan. A mass (arrow) was described as an “agglomerate of venous structures” involving a dilated right iliofemoral axis, but its tumor aetiology was not recognised. A nodule is observed but was reported as “thrombosed collateral circulation in the subcutaneous adipose plane of the ipsilateral inferior quadrant of the abdominal wall” (∗). The definitive diagnosis of primary venous leiomyosarcoma was obtained from a biopsy of the nodule.