An Abnormal Presentation of a Popliteal Artery Mass and a Unique Cause of Claudication.

Multiple hereditary exostosis (MHE) is a rare autosomal-dominant disorder marked by multiple osteochondromas arising from the metaphyses of long bones. Parameniscal cysts, often linked to meniscal tears, can also expand and compress nearby vessels, posing a potential vascular risk. We present a 28-year-old male with MHE and a parameniscal cyst causing popliteal artery compression. The patient's intermittent claudication resolved completely following surgical cyst decompression and meniscal repair. This case report highlights the importance of considering vascular compression in patients with MHE who present with lower extremity symptoms.