Concerning the clinical, radiographic, and scintigraphic aspects of Ahlbäck's disease, there are similarities with avascular necrosis of the femoral head. In 1980, therefore, we introduced a method of measuring bone marrow pressure which had been used in cases of osteoarthritis and pain in the knee. The measurement is done in the medial and lateral femoral condyle and in the medial part of the tibial head. Our findings were increased values in all stages of the disease, indicating that early (preradiographic) diagnosis and a differential diagnosis between osteoarthritis and osteonecrosis are possible using this method alone. We treat the earliest stages by core biopsy only (the bone cylinder is sent for histological classification) and have had very good results to date.
Coccygodynia means a lot of complaints with the most important of them, namely the spontaneous pain in the coccyx, in the top of the coccyx respectively. One can differ posttraumatic coccygodynias from others, which are the symptom of other diseases like lumbar pain, sciatica, tumors in the spinal canal, visceral diseases, that means disturbances in the gynaecologic system. By the mean of 19 predominantly female patients remarkable facts of the history, of the x-ray and clinical findings are listed up and compared in three different groups. To this examination the results of longtime-results of eleven patients who have been operated are united. The resection of the "os coccygis" doesn't seem to be a satisfying possibility to influence coccygodynias caused by traumas for a long time.
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