摘要
A 36-year-old woman presented with right iliac fossa pain in March 1988.Abdominal ultrasound showed nothing unusual and an appendectomy was performed for acute appendicitis.The resected appendix appeared inflamed without perforation.No enlarged lymph nodes were seen during surgery.Microscopic examination of the resected specimen showed acute appendicitis and a tumor in the lamina propria and submucosal layer,infiltrating to the deep muscular layer.Groups of four to ten tumor cells were arranged in small clusters which lacked central lumens and were widely separated by stroma.The tumor cells,which were distended with mucin and had crescentic nuclei,resembled signet ring cells （Figure 1A）.Keywords：recurrence; metastasis; appendiceal neoplasm; appendectomy; carcinoid tumor
A 36-year-old woman presented with right iliac fossa pain in March 1988.Abdominal ultrasound showed nothing unusual and an appendectomy was performed for acute appendicitis.The resected appendix appeared inflamed without perforation.No enlarged lymph nodes were seen during surgery.Microscopic examination of the resected specimen showed acute appendicitis and a tumor in the lamina propria and submucosal layer,infiltrating to the deep muscular layer.Groups of four to ten tumor cells were arranged in small clusters which lacked central lumens and were widely separated by stroma.The tumor cells,which were distended with mucin and had crescentic nuclei,resembled signet ring cells （Figure 1A）.Keywords：recurrence; metastasis; appendiceal neoplasm; appendectomy; carcinoid tumor
