Bessel-Hagen Disease: A Case Report of a Rare Disease.

Bessel-Hagen disease, also known as hereditary multiple exostoses, is a rare genetic disorder characterized by the development of multiple benign bony outgrowths (osteochondromas), most commonly at the metaphyses of long bones. Although it typically presents in childhood, the clinical manifestations can vary greatly, ranging from asymptomatic masses to significant skeletal deformities. In this case report, we describe a young adult male with a family history of exostoses who presented with a painless, visible mass on his anterolateral chest wall, along with a similar lesion on the anterior tibia. Radiological evaluation confirmed multiple osteochondromas, without signs of malignancy or inflammation. Given the location and progressive nature of the chest lesion, surgical resection was performed for both functional and cosmetic reasons. The postoperative course was uneventful, and follow-up showed no recurrence. This case highlights the importance of individualized management in Bessel-Hagen disease, where surgical intervention may be beneficial even in the absence of pain or complications.