Benign chondroblastoma presenting as meniscal lesion of the knee

Out of 300 patients seen during 1986-1988 and suspected to have meniscal tear in the knee, 5 patients proved to have benign chondroblastoma, 2 in the lower femoral epiphysis, 2 in the upper tibial epiphysis and one in the head of the fibula. The clue to diagnosis was the site of tenderness, which was on the bone and not the joint line. Diagnosis was confirmed by radiographic examination. Curettage resulted in complete disappearance of symptoms

Meniscal injuries of the knee: clinical and arthroscopic study

104 patients diagnosed as or suspected to have a torn meniscus were subjected to arthroscopic examination before arthrotomy. The patients were classified into three groups. A:60 patients with obvious clinical diagnosis. B:34 patients, meniscal injury was suspected but clinical diagnosis inconclusive. C:10 patients with vague knee pain in which a torn meniscus could be contributory. In the whole series arthroscopic diagnosis was wrong in 8 out of 104 patients. [6 medial and 2 lateral meniscus] and on arthrotomy the meniscus was found free [diagnostic error was 7.7%]. Clinical diagnosis was wrong or inaccurate in 22 patients and in 10 patients diagnosis was not sure with minimal objective findings. In the 22 patients with wrong or inaccurate clinical diagnosis, the meniscus was found free in 16 [10 medial and 6 lateral]. In 6 other patients there was associated tear of the lateral meniscus [diagnostic error was 30.7%]