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Table 3 Pathologic findings of 26 esophageal neuroendocrine tumors

From: The clinical features and treatment modality of esophageal neuroendocrine tumors: a multicenter study in Korea

Clinical characteristics Number (%)
No. of patients 26 (100)
Tumor differentiation (2000 WHO classification)  
Well differentiated 3 (11.5)
Mixed 2 (7.7)
Poorly differentiated 10 (38.5)
Not mentioned 11 (42.3)
Tumor differentiation (2010 WHO classification)  
G1 (mitotic count <2, Ki-67 < 2) None
G2 (mitotic count 2–20, Ki-67 3–20) None
G3 (mitotic count >20, Ki-67 > 20) 7 (26.9)
Not mentioned 19 (73.0)
Tissue immunostaining  
Synaptophysin 23 (88.5)
Chromogranin A 21 (80.8)
CD 56 8 (30.8)