Nonfunctioning Pancreatic Neuroendocrine Tumor Identified on Abdominal Ultrasonography During an Annual Health Check-up

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  • 人間ドックの逐年腹部超音波検査で発見された非機能性膵神経内分泌腫瘍の1例
  • 症例報告 人間ドックの逐年腹部超音波検査で発見された非機能性膵神経内分泌腫瘍の1例
  • ショウレイ ホウコク ニンゲン ドック ノ チクネン フクブ チョウオンパ ケンサ デ ハッケン サレタ ヒキノウセイスイシンケイ ナイブンピ シュヨウ ノ 1レイ

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<p>  A 57-year-old man was found to have a well-defined, low-echoic pancreatic nodule on abdominal ultrasonography during an annual health check-up and referred to a hospital. He was diagnosed with a pancreatic neuroendocrine tumor on cross-sectional imaging, and pancreatectomy was performed. On histopathological examination, the diagnosis was pancreatic neuroendocrine tumor.</p><p>  Pancreatic neuroendocrine tumors can be divided into functional tumors with endocrine symptoms characteristic of the tumor and nonfunctional tumors without endocrine symptoms. Nonfunctional tumors are often found due to progressive symptoms. With the spread of diagnostic imaging, some tumors have been detected by chance, so-called pancreatic incidentalomas. In the present case, detection was early for a nonfunctional tumor.</p><p>  Abdominal ultrasonography is becoming more important in the early detection of pancreatic tumors as the prevalence and mortality of pancreatic cancer increase. It has been reported that the pancreatic tumor stage is earlier and the postoperative prognosis is better in asymptomatic individuals than in symptomatic individuals. The pancreas is in the retroperitoneal space and may be poorly delineated by abdominal ultrasonography depending on the state of digestive tract gas.</p><p>  For the early detection of pancreatic neuroendocrine tumors, which progress slowly, it is important to devise innovative scanning methods and to conduct annual screening by ultrasonography regardless of whether there are abnormalities or not.</p>

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