Classic history and presentation: Camptodactyly is present at birth and is more often bilateral than unilateral, with 33% of cases being unilateral and 66% of cases being bilateral. It usually occurs in the proximal interphalangeal (PIP) joint of the small finger.
- Occurs in less than 1% of the population.
- Age – Present at birth.
- Sex / gender – There is no gender predilection; there can be autosomal dominant inheritance.
Pathophysiology: Abnormal insertion of FDS or lumbricals.
Grade / classification system: Benson classification
- Most common type.
- Generally affects the small finger.
- Equal distribution between males and females.
- Occurs in childhood, typically between the ages of 7 and 11 years.
- It is more common in females.
- This type does not resolve on its own.
- Seen at birth and usually affects several fingers.
- It is usually bilateral and has more severe features.
- This type is associated with syndromes.