Gastric Cancer
Copyright ©2006 Baishideng Publishing Group Co.
World J Gastroenterol. Oct 21, 2006; 12(39): 6280-6284
Published online Oct 21, 2006. doi: 10.3748/wjg.v12.i39.6280
Table 1 Gastric endocrine tumor classification, WHO[6]
ClassificationDiameterKi-67 PI1MitosisExtension
Well differentiated endocrine tumor (carcinoid tumor) ≤ 1 cm ≤ 2% ≤ 2/10 HPF2Mucosa- submucosa
Well differentiated endocrine carcinoma (malignant carcinoid)> 1 cm> 2%> 2/10 HPF2Muscularis propria and beyond
Poorly differentiated endocrine carcinoma (small cell carcinoma)Any diameter> 15%> 10/10 HPF2Vascular and neural invasion