37-year-old male with severe pain in the upper edge of the right posterior iliac bone and around to the anterior side. Palpable cystic mass is noted to site. Evaluate for malignancy versus fibrocystic mass. Exam is slightly limited by motion artifact.2 skin markers were placed adjacent to the right hemipelvis anteriorly corresponding to the site of palpable mass. No focal solid or cystic mass lesion is present in the pelvis. No abnormal enhancement is noted.There is mild subcutaneous soft tissue edema in the lateral anterior pelvis. Adjacent to the right anterior inferior iliac spine there is intermediate signal intensity along the course of the right rectus femoris tendon compatible with tendinosis and partial-thickness tearing of the tendon. There is mild adjacent bone marrow edema. The rectus femoris muscle appears normal. The remaining pelvic musculature and tendons are unremarkable.Mildly prominent inguinal lymph nodes are present bilaterally, nonspecific.The imaged bowel loops in the lower abdomen and pelvis are unremarkable. The prostate and bladder are unremarkable. No pelvic free fluid.
1. No evidence of a solid or cystic mass in the pelvis as clinically questioned.2. Tendinosis and partial-thickness tearing of the right rectus femoris tendon with adjacent bone marrow and soft tissue edema.