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Thenar hypoplasia with associated radiologic abnormalities
Insights
This study identifies thenar eminence hypoplasia as a developmental abnormality linked to radial club hand. Recognizing this condition is crucial for diagnosing carpal tunnel syndrome in adults.
Area of Science:
- Orthopedics
- Developmental Biology
- Radiology
Background:
- Thenar eminence hypoplasia is a condition affecting thumb muscle development.
- It can present unilaterally or bilaterally, impacting hand function.
- Differential diagnosis often includes other hand and wrist abnormalities.
Abstract:
We report on five patients who presented with unilateral or bilateral hypoplasia of the thenar eminence. X rays of the affected limbs showed varying degrees of malformation and underdevelopment of the thumb phalanges and first metacarpal bone, and of the carpal bones at the base of the thumb, indicating a developmental abnormality. Our electrodiagnostic findings were compatible with this interpretation. We suggest that this condition is part of the clinical spectrum of radial club hand (radial dysplasia) and that when seen in adults, its recognition is important in the differential diagnosis of carpal tunnel syndrome.