Intravenous leiomyomatosis of the uterus with extension to the right common iliac vein in a 34-year-old woman is reported. The successful treatment consisted of abdominal hysterectomy, bilateral salpingo-oophorectomy, venotomy and extraction of 3 cm long mobile tumour from the right common iliac vein. The presence of cytoplasmic oestrogen and progesterone receptors in the tumours indicates that intravenous leiomyoma is hormone-dependent.