Stomach cancer classification

Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]Associate Editor(s)-in-Chief: Parminder Dhingra, M.D. [2]

Stomach cancer Microchapters
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Patient Information
Overview
Historical Perspective
Classification
Pathophysiology
Causes
Differentiating Stomach Cancer from other Diseases
Epidemiology and Demographics
Risk Factors
Screening
Natural History, Complications and Prognosis
Diagnosis
Diagnostic study of choice
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Classification

World Health Organization histological classification of gastric tumors:

Types	Histological features
Epithelial tumors	Adenoma Carcinoma Adenocarcinoma Intestinal type Diffuse type Papillary adenocarcinoma Tubular adenocarcinoma Mucinous adenocarcinoma Signet-ring cell carcinoma Adenosquamous carcinoma Squamous cell carcinoma Small cell carcinoma Undifferentiated carcinoma Carcinoid (well differentiated endocrine neoplasm)
Non-epithelial tumors	Leiomyoma Schwannoma Granular cell tumour Glomus tumour Leiomyosarcoma GI stromal tumour Benign Uncertain malignant potential Malignant Kaposi sarcoma
Malignant lymphomas	Marginal zone B-cell lymphoma of MALT-type Mantle cell lymphoma Diffuse large B-cell lymphoma

Japanese histological classification of gastric tumors:

	Benign epithelial tumor Adenoma Malignant epithelial tumor Common type Papillary adenocarcinoma Tubular adenocarcinoma Well-differentiated Moderately differentiated Poorly differentiated adenocarcinoma Solid type Non-solid type Signet-ring cell carcinoma Mucinous adenocarcinoma
Special types	Carcinoid tumor Endocrine carcinoma Carcinoma with lymphoid stroma Hepatoid adenocarcinoma Adenosquamous carcinoma Squamous cell carcinoma Undifferentiated carcinoma
Miscellaneous carcinoma	Non-epithelial tumor Gastrointestinal stromal tumor (GIST) Smooth muscle tumor Neurogenic tumor Miscellaneous non-epithelial tumors Lymphoma B-cell lymphoma MALT (mucosa-associated lymphoid tissue) lymphoma Follicular lymphoma Mantle cell lymphoma Diffuse large B-cell lymphoma Other B-cell lymphomas T-cell lymphoma Other lymphomas Metastatic tumor Tumor-like lesion Hyperplastic polyp Fundic gland polyp Heterotopic submucosal gland Heterotopic pancreas Inflammatory fibroid polyp Gastrointestinal polyposis Familial polyposis coli, Peutz–Jeghers syndrome