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Ultrasound-Guided Sacral Erector Spinae Plane Block for Anorectal Surgery in a Patient with POEMS Syndrome: A Case Study and Literature Review

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Polyneuropathy, organomegaly, endocrinopathy, monoclonal gammopathy, and skin changes (POEMS) syndrome is a rare multisystem paraneoplastic disorder. The syndrome presents unique perioperative challenges, including sclerotic bone changes that may preclude conv... ...