Osteochondroma of the thoracic spine: a dumbbell mass associated with spinal cord compression.

Neurological complications such as spinal cord compression has rarely been reported both in the solitary type of osteochondroma or in multiple osteochondromas. We report a a 65-year-old patient with a thoracic osteochondroma involving the neural arch of T6, and the corresponding rib, who was followed-up for 5 years. Approximately 3 years after partial surgical removal, the lesion manifested as a dumbbell mass passing through the neural foramen leading to cord compression, and a hemilaminectomy was performed with subtotal tumor excision. A clinical follow-up 2 years later revealed normal findings.