16 year old female with syndromic enchondroma. BONE MARROW: There are numerous intermediate T1 and high T2 lesions especially medially along the proximal left femoral neck that appear similar to recent radiographs and increased when compared to prior MRI. One lesion extends from the femoral neck into the head, crossing the physis. Many similar lesions are noted in the femoral diaphysis, where they become confluent and expand the diaphysis and thin the cortical margin of the bone. These lesions also demonstrate a low T2 rim. No fracture line is identified.These lesions demonstrate peripheral and septal enhancement while centrally intermediate T1 signal remains.SOFT TISSUES: There are a few prominent subcentimeter lymph nodes in the left inguinal region. No soft tissue masses. JOINTS: Joint spaces are well-maintained. No joint effusion present.ADDITIONAL
Multiple areas of marrow replacement by a nonaggressive appearing lesions. There is peripheral and septal enhancement with areas of endosteal scalloping. The differentiation between enchondroma and low-grade chondrosarcoma is difficult by imaging. This is favored to represent enchondroma given lack of radiographic changes from 2011.