Abstract
A 57–year–old man was admitted to the hospital because of recurrent abdominal distention and diarrhea. Ileus due to stenosis of the terminal ileum, was diagnosed and conservative therapy was initiated. No symptomatic remission was attained and 8F–fluorodeoxyglucose–positron emission tomography (FDG–PET) showed high FDG accumulation in the terminal ileum with a standardized early–phase uptake of 3.06 and late–phase of 3.48. Operation was thus carried out. Laparotomy revealed swelling of lymph node No.202, but no malignancy was demonstrated by intraoperative frozen section diagnosis. Therefore, ileocecal resection with lymph node dissection was performed. The histopathological diagnosis was poorly differentiated appendiceal adenocarcinoma in StageII.
The diagnosis of appendiceal adenocarcinoma is difficult to make preoperatively. To our knowledge, no cases have been reported in the Japanese literature describing FDG–PET findings of appendiceal adenocarcinoma. FDG–PET appears to be a helpful tool for making the diagnosis of colonic type appendiceal adenocarcinoma.
