Surgical Pathology Criteria

Adenocarcinoma of the Stomach

Differential Diagnosis

CK7 and CK20 expression in carcinomas

CK7+20+ CK7-20+
Ovary mucinous 90% Colorectal adeno 80%
Transitional cell 65% Merkel cell 70%
Pancreas adeno 65% Gastric adeno 35%
Cholangio 65%  
Gastric adeno 40%  
Excluded tumors 5% or less Carcinoid; Germ cell; Esoph squam; Head/neck squam; Hepato-cellular; Lung small cell & squam; Ovary non-mucinous; Renal adeno Excluded tumors 5% or less Breast; Carcinoid lung; Cholangio; Esoph squam; Germ cell; Lung all types; Hepato-cellular; Ovary; Pancreas adeno; Renal adeno; Transitional cell; Uterus endometrioid
CK7+20- CK7-20-
Ovary non-mucinous 100% Adrenal 100%
Thyroid (all 3 types) 100% Seminoma & Yolk Sac 95%
Breast 90% Prostate 85%
Lung adeno 90% Hepatocellular 80%
Uterus endometrioid 85% Renal adeno 80%
Embryonal 80% Carcinoid intestinal & lung 80%
Mesothelioma 65% Lung small cell & squam 75%
Transitional cell 35% Esoph squam 70%
Pancreas adeno 30% Head/neck squam 70%
Cholangio 30% Mesothelioma 35%
Excluded tumors 5% or less Colorectal adeno; Ovary mucinous; Yolk Sac; Seminoma Excluded tumors 5% or less Breast; Cholangio; Lung adeno; Ovary; Pancreas adeno
  • Derived from Chu PG, Weiss LM. Histopathology 2002, 40:403-439 and other sources
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