INTRODUCTION Heterotopic ossification occurs when bone develops in tissues which usually don't undergo ossification. Heterotopic mesenteric ossification, also known as intra-abdominal myositis ossificans, is a rare and benign form of ossification, usually related with previous abdominal surgery or trauma. PRESENTATION OF CASES We report two cases of heterotopic ossification both after multipl...

Liposarcoma with osteosarcomatous dedifferentiation is a very rare condition; only eighteen cases have been reported thus far worldwide (1-9). Among them, there are only four radiologic reports to date (1, 6-8). Most caseshave occurred in the retroperitoneum or lower extremities, and to our knowledge, there has been no report of tumor developed in the chest wall. Although nonfatty areas with os...

We describe a 23-year-old woman with neuritis ossificans involving the tibial, common peroneal and lateral sural nerves. She presented with chronic debilitating posterior knee pain. An MRI scan showed masses in these nerves, biopsy of which revealed a histological diagnosis of neuritis ossificans. Treatment with OxyContin and Neurotin for two years resulted in resolution of symptoms. Follow-up ...