Yoshihiro Noro

Prosthetic Replacements in Patients on Hemodialysis for Chronic Renal Insufficiency

Twelve prosthetic hip and knee replacements (eight bipolar endoprosthetic replacements, three conventional total hip replacements, and one hemiarthroplasty of the knee) were implanted between 1978 and 1988 in eleven patients who underwent hemodialysis for chronic renal insufficiency. Five replacements (three conventional total hip replacements, one bipolar endoprosthetic replacement, and one hemiarthroplasty of the knee) in four patients had a failure due to the loosening of the component. In these four patients, the median age at operation was 51 years and the average length of follow-up was 6 years. One of these patients died of infection in both loosened total hip replacements seven years and four months after the operation.

Cervial Radiculomyelopathy due to Calcification of the Ligamentum Flava. Case Report

A case of cervical radiculomyelopathy caused by calcification of the ligamanta flava of the cervical spine is reported. Roentgenological examination of the cervical spine showed radiopaque nodular lesions located symmentrically in the paramedian portion of the posterior spinal canal. The nodules were removed surgically and they were confirmed to be calcifications of the ligamenta flava. By x-ray diffraction study, the calcification was determined as hydroxyapatite.