ABSTRACT
Tumoral calcinosis is a hereditary disease of calcium and phosphate metabolism causing peri-articular tumors of calcium deposits. We present a case of tumoral calcinosis in a 13-year-old male with a history of a 12q13.11 genetic deletion. Surgical resection of the tumor necessitated resection of the ACL in its entirety with curettage and adjuvant therapy to the lateral femoral notch, which resulted in ligamentous instability and bony structural incompetency at the femoral insertion. Given the patient's radiographically-apparent skeletal immaturity, and lack of reliable bony architecture to accommodate a femoral ACL tunnel, ACL reconstruction was performed using a physeal-sparing technique. This is a case of tumoral calcinosis treated with, to our knowledge, the first ACL reconstruction using this modified open technique.