20-year-old female with a history of a pelvic desmoid tumor, currently being treated with tamoxifen. PELVIS: Again seen is an ill-defined infiltrating mass in the left hemipelvis which has increased in size compared to the prior examination. The mass measures 9.6 x 7.3 cm (series 14, image 81), previously 9.5 x 6.6 cm. It continues to encase the left external iliac artery. The mass invades and occludes the left external iliac vein with collaterals again identified. Anteriorly, the mass invades largest left rectus muscle and adductor brevis. Laterally, the mass invades the left pelvic sidewall, iliacus muscle, psoas muscle, and abuts the left acetabular cortex. Posteriorly, the mass extends into the obturator internus muscle. Medially, the mass abuts the left lateral bladder wall and multiple loops of bowel. There is increased extension into the perirectal area and probable increased extension/invasion into the left psoas muscle. UTERUS, ADNEXA: No significant abnormality noted. BLADDER: The urinary bladder is displaced to the right. LYMPH NODES: No significant abnormality noted. BOWEL, MESENTERY: No significant abnormality noted. BONES, SOFT TISSUES: No significant abnormality noted.
Increase in size and extent of the left pelvic desmoid tumor. 