Atraumatic Isolated Dislocation of Pisiform With Ulnar Nerve Palsy

Area of Science:

• Orthopedic Surgery
• Traumatology
• Anatomy

Background:

• Isolated pisiform dislocation is a rare wrist injury.
• Limited literature exists on atraumatic presentations.
• Understanding pisiform stability is crucial for wrist function.

Observation:

• A 15-year-old male presented with atraumatic left wrist pain, deformity, and ulnar nerve palsy affecting the little and ring fingers.
• Radiographic imaging confirmed an isolated dislocation of the pisiform bone.
• The patient experienced symptoms without a history of significant trauma.

Findings:

• The patient underwent successful open reduction and stabilization of the dislocated pisiform.
• Exploration of the ulnar nerve was performed concurrently.
• Post-operative outcomes were positive, with resolution of symptoms.

Implications:

• This case highlights a unique presentation of pisiform dislocation.
• It underscores the importance of considering pisiform instability in atraumatic wrist injuries with neurological deficits.
• Surgical management can effectively restore wrist function and alleviate nerve compression.