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Case for diagnosis. Pachydermodactyly.

Camila Bueno Requena1, Hélio Amante Miot1, Mariângela Esther Alencar Marques1

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Summary

Pachydermodactyly, a rare skin condition, involves soft tissue expansion around finger joints. Stopping compulsive finger manipulation led to partial regression of these benign fibromatosis lesions.

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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.