Polydactyly

Editor-In-Chief: Prab R Tumpati, MD
Obesity, Sleep & Internal medicine
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Polydactyly
A hand with polydactyly
Synonyms	Polydactylism, hyperdactyly
Pronounce	N/A
Specialty	N/A
Symptoms	Presence of extra fingers or toes
Complications	Possible difficulty with functionality or cosmetic concerns
Onset	Congenital
Duration	Lifelong
Types	N/A
Causes	Genetic mutation
Risks	Family history
Diagnosis	Physical examination, X-ray
Differential diagnosis	Syndactyly, Cleft hand
Prevention	None
Treatment	Surgical removal of extra digits
Medication	None
Prognosis	Generally good with treatment
Frequency	1 in 500 to 1 in 1,000 live births
Deaths	N/A

Polydactyly of left hand AP

Polydactyly ECS

X-ray of feet in polydactyly

Polydactyly is the presence of an excessive number of fingers or toes.

Polydactyly

Features

The condition may be present as part of a collection of abnormalities, or it may exist by itself.

Inheritance

When polydactyly exhibits by itself, it is inherited as an autosomal dominant trait.

Polydactyly

Racial differences

African Americans are more likely to have polydactyly compared to Caucasians

Causes

Some of the causes include:

• Asphyxiating thoracic dystrophy
• Carpenter syndrome
• Ellis-van Creveld syndrome (chondroectodermal dysplasia)
• Smith-Lemli-Opitz syndrome
• Trisomy 13
• Familial polydactyly
• Laurence-Moon-Biedl syndrome
• Rubinstein-Taybi syndrome

Images

Newborn with polydactyly of both feet

Polydactyly preaxial