Abstract
Purpose : We have studied endoscopic findings and clinical courses of 13 cases of rectal carcinoid that were treated in our hospital from June 2007 to December 2009.
Method : The resected tumor size was less than 5mm in 5 cases, 5～10mm in 7 cases, and 12mm in one case. The small tumors were hemispherical, Is polyp, or submucosal tumor in shape and white or yellow in color. The 12mm one showed a shape of Isp polyp.
Results : As an initial therapy, EMR or ESD was performed in 1 or 12 cases, respectively.
In 12 cases with less than 10mm tumors, the vertical margins were unclear in two cases and negative in other 10 cases. No recurrence has been observed so far in these 12 cases.
In the case of 12mm tumor, the vertical margin was clearly positive after ESD, so additional rectal resection was performed. After two years, lymphadenopathy was revealed by CT examination and diagnosed as metastatic recurrence by FDG-PET.
Discussion : We suggest that carcinoid tumors with a size of less than 10mm can be curably removed by endoscopic therapy. If the size is more than 10mm, however, we should consider a possibility of metastasis and FDG-PET is useful for the evaluation.
