Q74.3

Clinical Causes: Genetic mutations that affect the development of muscles and joints during fetal growth. Decreased movement in the womb due to conditions like intrauterine constraint or uterine abnormalities. Maternal health issues such as infections or metabolic disorders that interfere with fetal development. Amniotic band syndrome, where fibrous bands in the amniotic sac restrict fetal movement and joint formation. Environmental factors and exposure to harmful substances during pregnancy.

Key Symptoms: Presence of joint stiffness or contractures at birth affecting one or multiple joints. Limited movement or inability to fully extend or bend affected joints. Muscle weakness or underdevelopment in the affected areas. Postures that appear abnormal due to tight joints or muscle imbalance. Possible involvement of the spine leading to scoliosis or other spinal deformities. In some cases, associated anomalies such as clubfoot or hip dislocation.

Diagnosis Path: Diagnosis of arthrogryposis multiplex congenita is primarily clinical, based on physical examination of joint contractures present at birth. Imaging studies such as X-rays help assess bone and joint structure, while ultrasound during pregnancy can sometimes detect joint abnormalities prenatally. Additional assessments may be necessary to identify other related anomalies or genetic causes. The diagnosis is often confirmed by identifying characteristic joint positioning and muscle tone anomalies.

Treatment Protocols: Management of AMC is multidisciplinary and aimed at improving joint function and mobility. Treatment approaches include: - **Physical Therapy:** Regular exercises to increase flexibility, muscle strength, and joint range of motion. - **Orthopedic Interventions:** Splints, braces, or surgical procedures to correct joint deformities and improve function. - **Assistive Devices:** Use of mobility aids such as wheelchairs, walkers, or specialized footwear. - **Monitoring and Addressing Associated Conditions:** Such as spinal deformities or limb discrepancies. - **Long-term Care:** Ongoing therapy and medical support tailored to individual needs to maximize independence and quality of life. While there is no cure for AMC, early intervention can significantly improve outcomes, helping individuals achieve greater mobility and functional abilities.