Polydactyly Overview
Learn About Polydactyly
Polydactyly is a condition in which a person has more than 5 fingers per hand or 5 toes per foot.
Extra digits; Supernumerary digits
Having extra fingers or toes (6 or more) can occur on its own. There may not be any other symptoms or disease present. Polydactyly may be passed down in families. This trait involves only one gene that can cause several variations.
African Americans, more than other ethnic groups, can inherit a 6th finger. In most cases, this is not caused by a genetic disease.
Polydactyly can also occur with some genetic diseases.
Extra digits may be poorly developed and attached by a small stalk. This most often occurs on the little finger side of the hand. Poorly formed digits are usually removed. Simply tying a tight string around the stalk can cause it to fall off in time if there are no bones in the digit.
In some cases, the extra digits may be well-formed and can even function.
Larger digits may need surgery to be removed.
Causes may include:
- Asphyxiating thoracic dystrophy
- Carpenter syndrome
- Ellis-van Creveld syndrome (chondroectodermal dysplasia)
- Familial polydactyly
- Laurence-Moon-Biedl syndrome
- Rubinstein-Taybi syndrome
- Smith-Lemli-Opitz syndrome
- Trisomy 13
You may need to take steps at home after surgery to remove an extra digit. These steps may include checking the area to make sure the area is healing and changing the dressing.
Most of the time, this condition is discovered at birth when the baby is still in the hospital.
The health care provider will diagnose the condition based on a family history, medical history, and a physical exam.
Medical history questions may include:
- Have any other family members been born with extra fingers or toes?
- Is there a known family history of any of the disorders linked to polydactyly?
- Are there any other symptoms or problems?
Tests used to diagnose the condition:
- Chromosome studies
- Enzyme tests
- X-rays
- Metabolic studies
You may want to make a note of this condition in your personal medical record.
Extra digits may be discovered after the first 3 months of pregnancy with ultrasound or a more advanced test called embryofetoscopy.
Alicia Aycinena is a Medical Genetics provider in Bronx, New York. Dr. Aycinena and is rated as an Experienced provider by MediFind in the treatment of Polydactyly. Her top areas of expertise are Dilated Cardiomyopathy with Hypergonadotropic Hypogonadism, Retinopathy Pigmentary Mental Retardation, Multiple Synostoses Syndrome 1, and Cardiomyopathy Hypogonadism Metabolic Anomalies.
Montefiore Medical Center
Steven Koehler is a Hand Surgeon and an Orthopedics provider in Bronx, New York. Dr. Koehler and is rated as an Experienced provider by MediFind in the treatment of Polydactyly. His top areas of expertise are Brachial Plexopathy, Mononeuritis Multiplex, Carpal Tunnel Syndrome, Nerve Decompression, and Osteotomy.
Ronald Bainbridge is a Neonatologist and a Pediatrics provider in Bronx, New York. Dr. Bainbridge and is rated as an Experienced provider by MediFind in the treatment of Polydactyly. His top area of expertise is Polydactyly.
Summary: TITLE: Whole genetic approach in Early Genetic Identification of Obesity (WEGIO) DESIGN: Multicenter epidemiological study STUDY POPULATION: Participants at risk for a syndromic or a monogenic genetic obesity, incl. participants clinically diagnosed with Bardet-Biedl-Syndrome (BBS) NUMBER OF PARTICIPANTS: 1000 for initial genetic sequencing and app. 40 for the follow-up documentation COORDINATING ...
Summary: The goal of this observational study is to analyse the cartilage and bone forming potential of cells isolated from the tissues of patients undergoing surgery for the treatment of polydactyly, hip dislocation and from other bio-banked cartilage tissues. The main question it aims to answer is: Which of the following tissues from polydactyly digit, iliac apophysis or other bio-banked cartilage produc...
Published Date: November 06, 2023
Published By: Neil K. Kaneshiro, MD, MHA, Clinical Professor of Pediatrics, University of Washington School of Medicine, Seattle, WA. Also reviewed by David C. Dugdale, MD, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team.
Carrigan RB. The upper limb. In: Kliegman RM, St. Geme JW, Blum NJ, Shah SS, Tasker RC, Wilson KM, eds. Nelson Textbook of Pediatrics. 21st ed. Philadelphia, PA: Elsevier; 2020:chap 701.
Mauck BM. Congenital anomalies of the hand. In: Azar FM, Beaty JH, eds. Campbell's Operative Orthopaedics. 14th ed. Philadelphia, PA: Elsevier; 2021:chap 80.
Son-Hing JP, Thompson GH. Congenital abnormalities of the upper and lower extremities and spine. In: Martin RJ, Fanaroff AA, Walsh MC, eds. Fanaroff and Martin's Neonatal-Perinatal Medicine. 11th ed. Philadelphia, PA: Elsevier; 2020:chap 99.