1. A case of primary osteosarcoma of the patella is reported.

2. A brief review of the literature has been made.

3. In the author's opinion only nine genuine cases have been reported, including the present case.

Two cases of neuropathic joints in diabetes mellitus are described. The condition, though rare, must be kept in mind in diabetes with neuropathy. With proper control of the diabetes and supportive measures to the joints the prognosis is relatively good.