Male 50 years old Reason: 50M with pain in rectum and soft tissue mass between scrotum and rectum seen on US History: soft tissue mass PELVIS:PROSTATE/SEMINAL VESICLES: No significant abnormality noted.BLADDER: No significant abnormality noted.LYMPH NODES: Bilateral enlarged external iliac lymph nodes. A node on the right side measures 1.6 x 1.1 cm (series 11, image 33). Enlarged left femoral and inguinal lymph nodes.BOWEL, MESENTERY: No significant abnormality noted.BONES, SOFT TISSUES: There is a 7.2 x 11.6 x 11.1-cm infiltrating, enhancing, mildly T2 hyperintense mass centered in the left perineum/medial adductor region. The mass is mildly hypointense to muscle on T1-weighted images. There is a somewhat cystic component posteriorly. The mass invades the penile base, and extends into the left adductor musculature and into the lower pelvis. A satellite component extends along the left hamstring tendon. There are scattered central flow voids within the lesion. The cortex of the overlying left inferior pubic ramus is intact without remodeling.OTHER: No significant abnormality noted.
Infiltrating left perineum/groin mass extending into the pelvis and the adjacent soft tissues with enlarged pelvic lymph nodes. Differential considerations includes a sarcoma, infiltrative tumor of neural origin, aggressive hemangioma. Other soft tissue malignancies are not excluded and orthopedic oncology consultation is recommended. 