[Foreign Body Granuloma on Posterior Neck due to Wear and Migration of Interlaminar Spacer after Cervical Spinal Stenosis Surgery: A Case Report].

The use of interlaminar spacers in double-door laminoplasty for treating cervical spinal stenosis is a relatively new technique; however, reports of complications associated with this procedure are rare. Here, we present the case of a 42-year-old male who presented with a posterior neck mass 2 years after undergoing double-door laminoplasty with interlaminar spacers. Imaging studies, including ultrasonography, plain radiography, and MRI, revealed the wear, fragmentation, and migration of multiple interlaminar spacers, thereby forming a foreign body granuloma. This case highlights a rare complication that emphasizes the need for awareness and careful postoperative follow-up to detect such adverse outcomes.