Case Study: Osseous Pathology with Peripheral Nerve Entrapment and Neuromata

Area of Science:

• Orthopedic Surgery
• Neurology
• Biomaterials Science

Background:

• Peripheral nerve injuries and entrapments can arise from various causes, including iatrogenic factors and immobilization.
• Osseous pathology can significantly influence the development and progression of neurological complications.
• The choice of surgical implants and techniques is critical in preventing secondary complications.

Observation:

• A patient presented with an iatrogenic injury to a branch of the medial dorsal cutaneous nerve, causing a painful scar.
• Secondary injury to the common peroneal nerve occurred due to cast immobilization, leading to foot drop.
• Tarsal tunnel entrapment was suspected as a consequence of prolonged cast immobilization and chronic swelling.

Findings:

• The patient experienced persistent postoperative chronic pain, exacerbated by the breakdown of a polymeric silicon (Silastic) implant.
• Failure to use grommets with the Silastic implant resulted in implant degradation and subsequent detritic synovitis.
• The complex interplay between osseous pathology, nerve entrapment, and implant-related complications was evident.

Implications:

• This case underscores the importance of meticulous surgical technique to avoid iatrogenic nerve injuries.
• Careful consideration of immobilization methods is necessary to prevent secondary nerve damage and entrapment.
• The selection and proper use of biomaterials, including the use of grommets with implants, are vital for long-term implant success and patient outcomes.