Case for diagnosis. Pachydermodactyly

Area of Science:

• Dermatology
• Pathology

Background:

• Pachydermodactyly is a rare, benign acquired digital fibromatosis.
• It presents as soft tissue expansion around proximal phalanges and interphalangeal joints.
• The exact cause is unknown, but repetitive mechanical trauma is suspected.

Observation:

• A case study of a young man with skin thickening around interphalangeal joints is presented.
• The patient exhibited a compulsive finger manipulation habit.
• This habit involved interlacing or rubbing of the fingers.

Findings:

• Histopathology revealed hyperkeratosis, papillomatosis, increased fibroblasts, and dermal mucinosis.
• The lesions showed partial regression after the cessation of compulsive finger manipulation.
• This suggests a link between mechanical trauma from finger manipulation and pachydermodactyly.

Implications:

• Understanding the etiology of pachydermodactyly can aid in diagnosis and management.
• Behavioral modification, like stopping compulsive habits, may be a viable treatment strategy.
• Further research into the role of mechanical trauma in acquired digital fibromatosis is warranted.