Fibular aplasia-ectrodactyly syndrome

Fibular aplasia-ectrodactyly syndrome is an extremely rare congenital limb malformation disorder characterized by the combination of absence or severe underdevelopment of the fibula (the smaller bone of the lower leg) and ectrodactyly, which is a split hand/foot malformation sometimes described as 'lobster claw' deformity. The condition primarily affects the skeletal system, specifically the limbs. Patients typically present at birth with bilateral or unilateral absence of the fibula along with missing or fused digits and deep clefts in the hands and/or feet. The lower limbs may be shortened and bowed due to the absent fibula, which can also lead to ankle instability and difficulty with ambulation. The syndrome has been reported in only a small number of families and sporadic cases in the medical literature. Some reported cases suggest autosomal dominant inheritance with variable expressivity, meaning that affected individuals within the same family may show different degrees of severity. The upper and lower limbs can be variably involved, and additional skeletal anomalies may occasionally be present. There is no cure for fibular aplasia-ectrodactyly syndrome. Management is supportive and symptomatic, typically involving a multidisciplinary team including orthopedic surgeons, physical therapists, and prosthetists. Treatment options may include orthopedic surgical interventions such as limb lengthening procedures, corrective osteotomies, or in severe cases, amputation with prosthetic fitting to improve mobility. Reconstructive hand surgery may be considered to improve hand function. Early intervention and rehabilitation are important to optimize functional outcomes and quality of life.

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