[Adenocarcinoid (mucinous carcinoid) of the vermiform appendix]

Adenocarcinoid (mucinous carcinoid or goblet cell carcinoid) is an unusual tumour of the appendix with histologic and prognostic features between those of carcinoid and adenocarcinoma. Most patients with adenocarcinoid tumours of the appendix present with symptoms consistent with those of acute appendicitis. We describe a 31 year-old male who presented with such symptoms. Ultrasonography demonstrated an acutely inflamed appendix with a hypoechoic area in the midportion of the appendix, suspicious of a tumour. This rare type of tumour is briefly presented.