Extraskeletal juxtaarticular chondroma of the knee.

Extraskeletal chondromas are atypical lesions and their recognition is important to avoid invasive treatment methods like marginal excision. The diagnosis must be confirmed with correlating clinical, radiological and histopathological examination. We report a 40-year-old woman with an extraskeletal chondroma around the knee joint. The radiological and histopathological aspects of the patient are presented along with a review of the literature.