[Hereditary sclerodactyly and syndactyly].

Area of Science:

• Genetics
• Dermatology
• Clinical Case Study

Background:

• Hereditary sclerodactyly is a rare genetic disorder characterized by skin thickening and flexion contractures of the fingers, typically manifesting in early youth.
• Autosomal dominant inheritance patterns with reduced penetrance are often associated with this condition.
• Understanding the genetic basis and clinical presentation of rare diseases is crucial for accurate diagnosis and management.

Observation:

• A 61-year-old male presented with sclerodactyly affecting the hands, characterized by thickened, sclerotic finger skin and atrophic, dry dorsal hand skin.
• The patient also exhibited syndactyly, specifically the fusion of the second and third toes on both feet.
• Notably, the condition showed no progression and lacked associated signs of Raynaud's phenomenon.

Findings:

• The clinical presentation included sclerotic and thickened skin on the fingers, alongside atrophic and dry skin on the dorsal aspects of the hands.
• Syndactyly of the second and third toes was observed bilaterally.
• Family history analysis suggested an autosomal dominant inheritance pattern, complicated by reduced penetrance, as indicated by a similarly affected grandfather.

Implications:

• This case highlights the variable clinical manifestations and inheritance patterns of hereditary sclerodactyly.
• It underscores the importance of thorough clinical examination and family history in diagnosing rare genetic dermatological conditions.
• Further research into the genetic underpinnings of reduced penetrance in sclerodactyly could improve diagnostic accuracy and genetic counseling.