M23.612

Clinical Causes: Degenerative changes within the ligament, weakening its structure over time Chronic overuse or repetitive stress leading to weakening of ligament fibers Underlying systemic conditions that affect connective tissue health, such as rheumatoid arthritis or lupus Poor blood supply to the ligament, resulting in decreased healing and increased risk of spontaneous rupture Age-related degeneration, especially in older adults Previous knee injuries or surgeries that compromise ligament integrity Genetic factors influencing ligament strength and tissue resilience

Key Symptoms: Sudden onset of knee pain without specific injury A feeling of instability or the knee giving way during movement Swelling around the knee joint Limited range of motion or difficulty fully extending or flexing the knee A sensation of popping or tearing at the moment of rupture Tenderness upon touch around the knee joint After initial symptoms, persistent swelling and weakness may occur

Diagnosis Path: Diagnosing this condition involves a combination of clinical examination and imaging tests. A healthcare provider may perform physical assessments to evaluate knee stability, such as Lachman’s test, anterior drawer test, or pivot shift test. Imaging techniques include MRI scans, which can visualize the integrity of the ACL and identify tears or disruptions. X-rays are typically used to rule out associated fractures or bone injuries but are not sufficient alone to diagnose ligament injuries. In some cases, arthroscopy—a minimally invasive surgical procedure—may be performed for direct visualization of the ligament and surrounding structures.

Treatment Protocols: Conservative approaches such as rest, ice, compression, and elevation (RICE) Physical therapy to strengthen the muscles supporting the knee and improve stability Use of knee braces or supports to prevent further injury and provide stability Non-steroidal anti-inflammatory drugs (NSAIDs) to reduce pain and inflammation In cases where conservative treatment is ineffective, surgical repair or reconstruction of the ACL may be necessary Rehabilitation programs post-surgery to regain strength, flexibility, and range of motion Gradual return to activities under medical supervision to prevent re-injury