polydactyly
Also known as postaxial polydactyly, supernumerary digit, nonsyndromic polydactyly, isolated polydactyly, nonsyndromic polydactyly (disease)
Key facts
- Medical condition.name
- Polydactyly
- Medical condition.synonyms
- Hyperdactyly; polydactylism; supernumerary digits
- Medical condition.image
- Wanitetlefthand.jpg
- Medical condition.caption
- A left hand with postaxial extra finger
- Medical condition.specialty
- Medical genetics
- Medical condition.symptoms
- Extra fingers or toes
- Medical condition.complications
- Pain, low self-esteem, clumsiness
- Medical condition.onset
- Early development
- Medical condition.types
- SyndromicNon-syndromic: Pre-axial, axial or central, postaxial
- Medical condition.treatment
- Surgery
- Medical condition.frequency
- 4 to 12 per 10,000
via Wikipedia infobox
Article
41 sectionsContents
- Signs and symptoms
- Ulnar or postaxial
- Radial or preaxial
- Central
- Causes
- Syndromes
- Ulnar
- Radial
- Central
- Evolution
- Diagnosis
- Ulnar
- Radial
- Central
- Treatment
- Ulnar
- Type A
- Type B ulnar
- Radial
- Bilhaut-Cloquet procedure
- Ablation with collateral ligament reconstruction
- On top plasty procedure
- Central
- Complications
- Prognosis
- Ulnar
- Type A
- Type B
- Radial
- Bilhaut procedure
- Ablation with colateral ligament reconstruction
- On-top plasty procedure
- Central
- Epidemiology
- Society and culture
- People affected
- Fictional people
- Other animals
- See also
- References
- External links
Polydactyly (commonly known as sixth finger and extra finger) is a birth defect that results in extra fingers or toes. The hands are more commonly involved than the feet. Extra fingers may be painful, affect self-esteem, or result in clumsiness.
It is associated with at least 39 genetic mutations. It may either present alone or with other defects. Cases may run in families. The underlying mechanism involves an error in limb bud formation during early development. Diagnosis may occur before birth via prenatal ultrasound as early as nine weeks. X-rays may be useful after a child is a year old. The opposite is oligodactyly (fewer fingers or toes).