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Tetrapolydactyly of postaxial type
1Department of Radiology, Ege University Hospital, Bornova, Izmir, TR-35100, Turkey.
Pediatric Radiology
|November 1, 1995
Summary
This case study describes a rare congenital condition in a newborn with extra digits on all four limbs, known as postaxial type tetrapolydactyly. This finding offers new insights into limb malformation syndromes.
Area of Science:
- Medical Genetics
- Developmental Biology
- Orthopedics
Background:
- Polydactyly, the presence of extra digits, is a common congenital anomaly.
- Postaxial polydactyly specifically affects the little finger or toe side of the limb.
- Tetrapolydactyly, involving all four extremities, is exceptionally rare.
Observation:
- A 2-week-old male infant presented with polydactyly affecting the ulnar side of the upper extremities and the fibular side of the lower extremities.
- This presentation was classified as tetrapolydactyly of the postaxial type, meaning extra digits were present on all four limbs.
- The infant did not exhibit any signs of syndactyly, such as fused digits.
Findings:
- The observed tetrapolydactyly, despite the absence of syndactyly, aligns with descriptions of a previously documented limb malformation.
- This condition was previously labeled as tetrapolysyndactyly with postaxial type of polydactyly.
- The case highlights the spectrum of postaxial polydactyly and its potential variations.
Implications:
- This case contributes to the understanding of the phenotypic variability within postaxial polydactyly spectrum disorders.
- Further research into the genetic underpinnings of such isolated tetrapolydactyly is warranted.
- Accurate classification aids in genetic counseling and understanding potential associated conditions.