We present two cases of osteoid osteoma affecting the knee, a very infrequent localization and therefore of difficult diagnosis. The scintigraphy was found to be of valuable assitance in revealing the presence of this lesion at the knee and CT-scan was likewise useful for its precision in localizing the tumor as a basis for deciding upon a viable surgical approach. MRI did not contribute some date. After surgical resection of the tumor, a complete relief of the symptoms was experienced in both patients.... [Leer más...]