50-year-old female status post excision of right popliteal fossa synovial cell sarcoma. Evaluate for recurrence. A vitamin E capsule was placed along the posterior aspect of the knee, above the joint, presumably corresponding to the patient's scar from prior surgery. Again seen are postsurgical changes consistent with the patient's history of prior removal of a large biopsy-proven synovial sarcoma. There are multiple foci of metallic susceptibility artifact along the posterior aspect of the knee which are presumably postsurgical in etiology. There is bandlike subcutaneous decreased signal abnormality traversing the popliteal fossa compatible with scarring from prior surgery. Again seen is poorly defined intermediate signal abnormality lateral to the popliteal artery compatible with scar tissue, without abnormal enhancement to suggest residual/recurrent tumor, appearing slightly decreased in its extent when compared to the prior study. No joint effusion is identified. No significant muscular fatty atrophy or edema is identified. Underlying osseous structures are unremarkable.Please note this exam was not protocoled for fine detailed evaluation of the knee. Again seen is a horizontal tear involving the medial meniscus similar to prior. Heterogeneous signal within the medial patellar facet cartilage suggests mild degeneration also appearing similar to the prior study.
Postoperative changes of prior resection of a right knee synovial sarcoma without evidence of residual or recurrent tumor. Other findings as above.