Control case documenting the normal ultrasound appearance of the knee in a healthy adult. All morphometric parameters fall within the normal range for age. This case serves as a reference for identifying early pathological changes in comparative studies on hemophilic arthropathy.

This case represents end-stage hemophilic arthropathy with severe quadriceps tendon involvement as the dominant pathological feature. The score indicates near-maximal structural damage with severe functional disability. The extensive tendon pathology, including large calcifications, partial tear, and complete architectural disruption, represents irreversible damage accumulated over decades of inadequate hemostasis. Patient has been evaluated by orthopedic surgery with consensus for total knee arthroplasty within the next 6 months, pending optimization of hemostatic management and perioperative planning. The severe quadriceps tendon pathology poses significant surgical challenges, particularly regarding extensor mechanism reconstruction and postoperative rehabilitation potential. Preoperative optimization includes intensive prophylaxis with FVIII concentrate to minimize perioperative bleeding risk, nutritional optimization for wound healing, and psychosocial support given the significant disability and chronic pain syndrome. Pain management requires multidisciplinary approach including pain specialist consultation for opioid management and consideration of alternative modalities. Physical therapy at this stage is limited to maintaining residual range of motion and preventing complete ankylosis, though significant functional improvement is unlikely without surgical intervention. Patient and family counseling regarding realistic expectations for surgical outcomes is essential, as the severe soft tissue damage may limit functional recovery even after successful arthroplasty. This case exemplifies the devastating consequences of inadequately treated hemophilic arthropathy and underscores the critical importance of early prophylaxis initiation and adherence throughout childhood and adolescence to prevent such severe end-stage joint destruction.