Thumb Duplication Diagnosis and Treatment in Houston, TX


A congenital deformity where two thumbs, either separate or fused, are present on one hand, thumb duplication (or split thumb) is estimated to occur in approximately 1 out of every 1,000 live births. Rather than two fully developed thumbs, each thumb is less developed than normal, often dividing their vessels, nerves, tendons and muscles between them.


This condition is diagnosed through careful physical examination. X-rays are used to study the internal structure and for classification purposes.


Rather than simply removing one thumb, a functioning thumb must be created from components of both thumbs. Usually, the bones from the less developed thumb are removed, and the skin, tendons, vessels, nerves, finger nail and muscle is formed into a new thumb. This surgery is usually performed when the patient is around 12 months old.

Houston hand surgeon Dr. Fiore is board certified by the American Board of Surgery and fellowship trained in hand and microsurgery. For more information about thumb duplication, or to schedule a consultation, call Fiore Hand & Wrist Surgical Associates at (281) 970-8002.

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