Michitoshi Nakamura

Sacral chordoma developing two years after low anterior resection for rectal cancer

A 43-year-old male with sacral chordoma associated with rectal cancer is herein reported. A presacral tumor with extensive destruction of S4 and S5 was found 2.5 years after a low anterior resection for advanced rectal mucinous carcinoma. Under the preoperative diagnosis of a solitary sacral metastasis of rectal cancer, the lower sacral segments together with the tumor were removed by amputation at S3. Histologically, the tumor was a chordoma composed of polyhedral cells with an abundant eosinophilic cytoplasm mixed with typical vascuolated physaliferous cells within a myxoid matrix. Colorectal cancer associated with an extracolic primary malignant neoplasm is not uncommon; however, this is only the second case of colorectal cancer associated with chordoma to the best of our knowledge.

Ten Years Follow-up Findings in the Knee Joint with J-K Membrane

A total knee replacement was performed on a patient suffering from pain with rheumatoid arthritis. This knee had been done of arthroplasty using interposing chromicized fascia lata (J-K Membrane). Macroscopic and microscopic findings were studied. This paper reports these findings in the knee joint which had been passed for ten years with J-K membrane.