Mirror polydactyly-vertebral segmentation-limbs defects syndrome

Mirror polydactyly-vertebral segmentation-limbs defects syndrome (also known as Laurin-Sandrow syndrome or mirror hands and feet with nasal defects) is an extremely rare congenital malformation syndrome characterized by a distinctive combination of limb and skeletal anomalies. The hallmark feature is mirror polydactyly, in which the hands and/or feet display a symmetrical duplication pattern with extra digits arranged in a mirror-image configuration, often with absence of the thumb or great toe and duplication of the ulnar or fibular rays. Affected individuals also exhibit vertebral segmentation defects, which may include hemivertebrae, fused vertebrae, or other anomalies of the spinal column. Additional limb defects can include tibial or fibular abnormalities, and nasal anomalies such as a bifid or hypoplastic nose have been reported in some cases. The musculoskeletal system is primarily affected, though craniofacial features may also be involved. The condition is present at birth and is typically identified during the neonatal period or prenatally through ultrasound imaging. The syndrome is exceedingly rare, with only a small number of cases described in the medical literature. Management is primarily supportive and surgical, focusing on orthopedic correction of limb anomalies to improve function and appearance. Surgical removal of extra digits, correction of foot deformities, and spinal management may be required depending on the severity of the skeletal involvement. Genetic counseling is recommended for affected families. There is no cure, and treatment is directed at the specific symptoms present in each individual.

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