Adenocarcinoma ; classification ; pathology ; Adenocarcinoma, Mucinous ; pathology ; Biopsy ; Carcinoma, Ductal ; pathology ; Humans ; Male ; Neoplasm Grading ; methods ; standards ; Prostatic Neoplasms ; classification ; pathology

Adenocarcinoma ; classification ; genetics ; pathology ; Forecasting ; Humans ; Lung ; pathology ; Lung Neoplasms ; classification ; genetics ; pathology

Adenocarcinoma ; classification ; pathology ; Humans ; Male ; Prostatic Neoplasms ; classification ; pathology ; World Health Organization

Adenocarcinoma ; classification ; pathology ; Humans ; Male ; Neoplasm Grading ; methods ; standards ; Prostatic Neoplasms ; classification ; pathology

Adenocarcinoma ; classification ; pathology ; Endometrial Hyperplasia ; classification ; pathology ; Endometrial Neoplasms ; classification ; pathology ; Female ; Humans ; Neoplasm Invasiveness ; Neoplasm Staging ; Polyps ; pathology ; Precancerous Conditions ; classification ; pathology ; World Health Organization

Adenocarcinoma ; pathology ; Carcinoma ; pathology ; Carcinoma, Squamous Cell ; pathology ; Humans ; Nasopharyngeal Neoplasms ; classification ; pathology ; World Health Organization

OBJECTIVETo compare the old classification and 2004 WHO histological classification of renal cell carcinoma, summarize the differences and possible reasons, and correct the traditional pathological concepts of kidney cancer.

METHODSSpecimens of 79 cases histopathologically diagnosed as non-clear cell renal cell carcinomas after radical nephrectomy during 1998 to 2005 in Tianjin Medical University Cancer Hospital were reclassified according to the 2004 WHO renal cell carcinoma histological classification system.

RESULTSAfter reclassification, there were 14 cases of clear cell renal cell carcinoma (CCRCC), 23 cases of papillary renal cell carcinoma (PRCC), 34 cases of chromophobe renal cell carcinoma (ChRCC), one collecting duct renal cell carcinoma, one unclassified renal cell carcinoma, 5 cases of mixed cell renal cell carcinoma (CCRCC + PRCC 2 cases, CCRCC + ChRCC 2 cases, PRCC + ChRCC 1 case), and one oncocytoma diagnosed.

CONCLUSIONSSome chromophobe renal cell carcinomas and papillary renal cell carcinomas were easier to be diagnosed as granular cell renal cell carcinoma in the past. The eosinophilic cytoplasm similar to that in the granular cells, and some confusion between PRCC and ChRCC are the main reasons. The cellular characteristic features of granular renal cell carcinoma can be found in many types of renal tumors. Granular cell renal cell carcinoma is not an independent entity, therefore, it should be removed from the histological classification of renal cell carcinoma. The diagnosis standard of mixed renal cell carcinoma (MRCC) need to be determined and consummated.

Adenocarcinoma ; pathology ; Carcinoma, Renal Cell ; classification ; pathology ; Diagnosis, Differential ; Humans ; Kidney Neoplasms ; classification ; pathology ; World Health Organization

Adenocarcinoma ; classification ; genetics ; pathology ; surgery ; Cardia ; Esophageal Neoplasms ; classification ; genetics ; pathology ; surgery ; Esophagogastric Junction ; pathology ; Humans ; Lymphatic Metastasis ; Neoplasm Invasiveness ; Stomach Neoplasms ; classification ; genetics ; pathology ; surgery

Gastric epithelial neoplasia is a very common disease entity in Korea, encompassing gastric adenoma and adenocarcinoma. There are still discrepancies in pathologic diagnosis of gastric epithelial neoplasia between Western and Japanese pathologists after Vienna consensus classification. With increasing use of endoscopic therapy such as endoscopic mucosal resection and endoscopic submucosal dissection, it is very important to agree on the consensus criteria in the diagnosis of gastric epithelial neoplasia among pathologists in Korea. On this background, the current concepts, and contemporary issues of definition, diagnostic and classification criteria of gastric epithelial neoplasia were reviewed.
Adenocarcinoma/classification/*pathology ; Adenoma/classification/*pathology ; Biopsy ; Consensus Development Conferences as Topic ; Endoscopy, Gastrointestinal ; Epithelial Cells/pathology ; Humans ; Japan ; Observer Variation ; Stomach Neoplasms/classification/*pathology ; *Terminology as Topic

Adenocarcinoma ; classification ; pathology ; Carcinoma, Squamous Cell ; classification ; pathology ; Esophageal Neoplasms ; classification ; pathology ; Humans ; International Cooperation ; Lymphatic Metastasis ; pathology ; Neoplasm Invasiveness ; Neoplasm Staging ; methods ; standards ; Societies, Medical ; United States