Post-traumatic Arthrofibrosis of the Knee Joint in a Patient with Familial Cutaneous Collagenoma and Recent ACL reconstruction with Hamstring Allograf

Abstract

Familial cutaneous collagenoma is a rare, autosomal dominant hereditary disease. These collagenous bundles are typically seen as hypopigmented, superficial skin lesions along the trunk and the upper limbs. We report a case in which a 31-year-old patient presented with a disproportionate growth of scar tissue in the knee joint after having almost non-existent flexion and continued pain for 3 months after ACL reconstruction despite aggressive rehabilitation with formal therapy. In this case, there was no organic cause of tissue overgrowth or reason to expect such a drastic change in the joint space so soon after surgery. Histopathology of tissue from the left knee showed dense fibroconnective tissue with myxoid change and granulation tissue. The overgrowth was diagnosed as a form of collagen disorder with increased amounts of irregularly arranged dense fascicular bundles of collagen which are similarly seen in familial cutaneous collagenoma. To the best of our knowledge, our case is the first reported case of post-traumatic arthrofibrosis in a patient with familial cutaneous collagenoma (FCC) in American literature.