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

Research

4,511 papers

Polydactyly of the Foot: A Review.The Journal of the American Academy of Orthopaedic Surgeons · 2021
Polydactyly of the Hand.The Journal of the American Academy of Orthopaedic Surgeons · 2018
Radial Polydactyly.JBJS reviews · 2022
Polydactyly of the hand.American journal of orthopedics (Belle Mead, N.J.) · 2015
A review of polydactyly and its inheritance: Connecting the dots.Medicine · 2022

via PubMed

Wikidata facts

Image: Polydactyly 01 Lhand AP.jpg

Show 5 more facts

Commons category: Polydactyly
NCI Thesaurus ID: C87110
ICPC 2 ID: L82
exact match: www.orpha.net/ORDO/Orphanet_2913
ICD-9-CM: 755.0

Sources (3)

via Wikidata · CC0

~34 min read

Article

41 sections

Contents

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).