A Case of Nasopalatine Duct Cyst Treated by Endoscopic Endonasal Surgery for Opening of the Cyst

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  • 内視鏡下で開窓術を施行した鼻口蓋管嚢胞例

Abstract

<p>Nasopalatine duct cysts (NDCs) are relatively rare non-odontogenic cysts of the jaw, accounting for about 2–4% of all jaw cysts. Surgery is the first-line treatment for NDCs. Transpalatal or transgingival surgery is common for NDCs, but transnasal endoscopic surgery has recently been increasingly reported. We present a case of a 38-year-old man with an NCD in the median hard palate that was opened using endoscopic endonasal surgery. Endonasal endoscopy revealed raised lesions at the floor of the bilateral nasal cavities. Endoscopic transnasal surgery was performed from the right nasal floor, and the upper surface of the cyst was opened as wide as possible. After the operation, swelling of the bilateral nasal floor improved; and more than a year later, the cyst remained open and showed no malignant findings. There are several cases of NDCs complicated by malignancy. Therefore, it is important to follow the patient for a long period postoperatively. There are also several reports of surgery-related injury to the nasopalatine duct nerves and tooth sensory abnormalities; thus, surgical manipulation should be done carefully. Opening cysts by transnasal endoscopic surgery is less invasive than cystectomy by transpalatal or transgingival surgery. Our case suggests that transnasal endoscopic surgery can be very useful in cases of NDCs that do not show substantial components on imaging findings.</p>

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