• Curr Pain Headache Rep · Feb 2021

    Review

    A Comprehensive Review and Update of Post-surgical Cutaneous Nerve Entrapment.

    • Karina Charipova, Kyle Gress, Amnon A Berger, Hisham Kassem, Ruben Schwartz, Jared Herman, Sumitra Miriyala, Antonella Paladini, Giustino Varrassi, Alan D Kaye, and Ivan Urits.
    • Georgetown University School of Medicine, Washington, DC, USA.
    • Curr Pain Headache Rep. 2021 Feb 5; 25 (2): 11.

    Purpose Of ReviewThis is a comprehensive review of the literature regarding post-surgical cutaneous nerve entrapment, epidemiology, pathophysiology, and clinical presentation. It focuses mainly on nerve entrapment leading to chronic pain and the available therapies.Recent FindingsCutaneous nerve entrapment is not an uncommon result (up to 30% of patients) of surgery and could lead to significant, difficult to treat chronic pain. Untreated, entrapment can lead to neuropathy and damage to enervated structures and musculature, and significant morbidity and financial loss. Nerve entrapment is defined as pressure neuropathy from chronic compression. It causes changes to all layers of the nerve tissue. It is most significantly associated with hernia repair and other procedures employing a Pfannenstiel incision. The initial insult is usually incising of the nerve, followed by formation of a neuroma, incorporation of the nerve during closing, or constriction from adhesions. The three most commonly involved nerves are the iliohypogastric, ilioinguinal, and genitofemoral nerves. Cutaneous abdominal nerve entrapment could occur during thoracoabdominal surgery. The presentation of nerve entrapment usually involved post-surgical pain in the territory innervated by the trapped nerve, possibly with radiation that tracks the nerve course. Once a suspected neuropathy is identified, it can be diagnosed with relief in pain after a nerve block has been instilled. Treatment is usually started with pharmaceutical solutions, topical first and oral if those fail. Most patients require escalation to a second line of treatment and see good result with injection therapy. Those that require further escalation can choose between ablation and surgical therapies. Post-surgical nerve entrapment is not uncommon and causes serious morbidity and financial loss. It is underdiagnosed and thus undertreated. Preventing nerve entrapment is the best treatment; when it does occur, options include topical and oral analgesics, nerve blocks, ablation therapy, and repeat surgery.

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