Yes, there is a surgical procedure available to correct polydactyly of a triphalangeal thumb. The procedure involves removing the extra digit and reshaping the thumb to a normal shape. In some cases, medications may be prescribed to help reduce swelling and pain.

1. Family history of polydactyly
2. Maternal diabetes
3. Maternal use of certain medications during pregnancy
4. Maternal exposure to certain environmental toxins
5. Genetic mutations
6. Certain chromosomal abnormalities
7. Certain syndromes, such as Holt-Oram syndrome

1. Observation: In some cases, polydactyly of a triphalangeal thumb may not require any treatment. If the extra digit is not causing any functional problems, it may be best to simply observe the condition.

2. Surgery: If the extra digit is causing functional problems, surgery may be recommended to remove the extra digit. This procedure is typically done under general anesthesia and involves cutting the extra digit away from the thumb. The procedure is usually done on an outpatient basis and recovery time is usually short.

The exact cause of polydactyly of a triphalangeal thumb is unknown. However, it is believed to be caused by a combination of genetic and environmental factors. Some research suggests that it may be caused by a mutation in the HOXD13 gene, which is responsible for the development of the hand and digits. Other possible causes include exposure to certain medications or chemicals during pregnancy, or a family history of the condition.

The symptoms of Polydactyly of a triphalangeal thumb include having an extra thumb that is made up of three bones instead of two, having an extra thumb that is longer than the other thumb, and having an extra thumb that is more flexible than the other thumb.

Polydactyly of a triphalangeal thumb is a congenital condition in which a person is born with an extra thumb that has three phalanges (bones) instead of the usual two. This condition is relatively rare, and it is usually associated with other genetic disorders.