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Summary
This case report details an unusual congenital anomaly: dorsal skin and a fingernail found on the palm side of both small fingers. This rare digital malformation occurred in a child with a normal karyotype, differing from a previously reported similar case linked to a chromosome 6 abnormality.
Area of Science:
- Developmental biology
- Clinical genetics
- Congenital anomalies
Background:
- Congenital anomalies of the hand and digits are diverse, encompassing variations in structure and formation.
- Understanding the etiology of rare digital malformations is crucial for genetic counseling and clinical management.
- Previous literature has documented similar anomalies, sometimes associated with chromosomal abnormalities.
Observation:
- This report presents a unique case of bilateral dorsal skin and fingernail presence on the palmar aspect of the small fingers.
- A normal fingernail was observed on the dorsal surface of the same digits.
- The affected child exhibited a normal karyotype, indicating the anomaly is not due to major chromosomal aberrations.
Findings:
- The primary finding is a rare presentation of ectrodactyly or related digital malformation involving both palmar and dorsal surfaces of the small fingers.
- The presence of skin and nail tissue in an atypical location (palmar surface) is a key characteristic of this anomaly.
- The normal karyotype in this case suggests that the etiology may be distinct from previously reported cases linked to chromosomal abnormalities, such as chromosome 6.
Implications:
- This case expands the spectrum of known digital anomalies and highlights the variability in their presentation.
- Further research into the genetic and developmental pathways underlying such anomalies is warranted.
- Accurate diagnosis and understanding of the underlying mechanisms are essential for providing appropriate clinical care and genetic counseling to affected families.