An unusual presentation of synovial chondromatosis of the knee in a 10-year-old girl

Abstract

Synovial chondromatosis commonly occurs in the anterior compartment of the knee joint, predominantly in middle-aged men. It is relatively unusual in female children and is rarely encountered in thesynovium beneath the meniscus. The present report describes a rare case of synovial chondromatosisthat developed in the synovium just inferior to both menisci of the right knee in a 10-year-old girl. At thisunusual age and location, there is a greater probability of missed diagnosis, due to the lack of deŞniteinformative incidence, and difŞculty in Şnding the lesions during arthroscopic examinations. In thepresent case, multiple loose bodies were hidden by the meniscus, and thus, there were no structuralabnormalities in the initial arthroscopic views before probing the meniscus. After careful inspection, wefound numerous cartilaginous loose bodies and removed them as much as possible with arthroscopy.