胰癌是消化系统中最难诊断的癌肿,近来由于影像诊断法的进步,诊断水平显著提高。但早期诊断率、手术切除率仍很低,原因之一是对影像诊断的时机掌握欠佳。1976年作者和高木提出小胰癌诊断的设想。本文讨论如何掌握由肿瘤所致主胰管和胆总管梗阻引起的临床表现,及时用影像诊断确立小胰癌诊断。 Pancreatic cancer is the most difficult cancer to diagnose in the digestive system. Recently, due to advances in imaging diagnostics, the diagnostic level has significantly increased. However, the early diagnosis rate and surgical resection rate are still very low. One of the reasons is the poor timing of imaging diagnosis. In 1976, the author and Takagi proposed the diagnosis of small pancreatic cancer. This article discusses how to grasp the clinical manifestations caused by obstruction of the main pancreatic duct and common bile duct caused by tumors, and timely diagnose the diagnosis of small pancreatic cancer with imaging diagnosis.