Masahiko Ono

Clinical Evaluation of the Results of Posterior Decompression Surgery for OPLL in Cervical Spine

In the past, as a posterior decompression surgery for OPLL, Iaminectomy was perfomed. Howerver, postoperative follow-up was made difficult by such negative factors as instability of the operated part, abnormal alignment, scar formation, etc. Therefore, to counteract these negative results, a variety of Iaminoplasty are being tried in recent years. We have performed Iaminoplasty both by the Kirita and Hirabayashi methods at our hospital since 1983, and we hereby report our evaluation of the operative results and the postoperative complications.With the Hirabayashi method, we observed the limitation of the range of movement in the posterior flexion. We could observe no difference in the improvement rate of the clinical condition when using different operative techniques. Postoperatively, we had no case where OPLLs growth could be clearly observed.In case of the unilateral existence of ossifications with a high rate of stenosis, we thought it was necessary to practice sufficient caution at the time of operation in order to prevent complications.

A Case with Recurrent Idiopathic Hematoma in the Isolated Suprapatellar Pouch of Knee

A 24 years old female with recurrent idiopathic hematoma in the isolated suprapatellar pouch of the knee was treated in our clinic. Her chief complaint was extensive swelling at the region just proximal to the patella during the last 3.5 months, and recently she felt pain about the knee after long time of upright sitting. She had no evident history of trauma.The hematomacyst, which was isolated from the knee joint cavity by a thin membrane and covered by a capsule of 2mm thickness, was resected. It was diagnosed as bursitis histologically. There was no recurrence at 5 months after operation.