Thymocytes are immature T lymphocytes with varying degrees of maturation. They commonly are encountered in the study of anterior mediastinal masses and often are a significant component of hyperplastic thymus or lymphocyte-rich thymoma (type B1).
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Synonym(s): rectectomy. [proct- + G. ektomē, excision]
Definition: Surgical resection of the rectum.
hemicolectomy right hemicolectomy left hemicolectomy extended hemicolectomy
sigmoidectomy It is a resection of the sigmoid colon, sometimes including part or all of the rectum (proctosigmoidectomy). When a sigmoidectomy is followed by terminal colostomy and closure of the rectal stump, it is called a Hartmann operation; this is usually done out of impossibility to perform a "double-barrel" or Mikulicz colostomy, which is preferred because it makes (...)
According to the 2010 World Health Organization classification, all gastrointestinal neuroendocrine tumors (NETs) are classified as malignant except for L-cell-type (glucagon-like peptide [GLP] and peptide YY [PYY]-producing) NETs.
Non-L-cell immunophenotype and large tumor size are associated with increased tumor grading and staging, concurrently indicating that they are independently poor prognostic indicators in rectal NET patients. Therefore, combining L-cell phenotype and tumor size (...)
cadherin-17; cadherin 17;
Cadherin 17 (CDH17) is expressed primarily in the normal intestine and digestive tract tumors and has not been detected in tumors from other sites including the kidney.
Expression in tumors
metanephric adenoma Metanephric adenoma (MA) is a rare benign renal neoplasm that shares morphologic and immunophenotypic overlap with epithelial-predominant Wilms tumor (e-WT) and with the solid variant of papillary renal cell carcinoma (s-PRCC). CDH17 is a sensitive (...)
Fibroblastic reticular cell (FRC) neoplasms
Fibroblastic reticular cell (FRC) neoplasms, which are one of the histiocyte tumor types, are very rare.
cytokeratin (CK)-positive FRC neoplasm having features of follicular dendritic cells
lymph node : multiple nodular aggregations simulating and replacing normal follicles. - The tumor cells have a uniform, large and oval to polygonal shape, abundant cytoplasm, and various sizes of nuclei with central eosinophilic nucleoli and (...)
Abrupt Loss of MLH1 and PMS2 Expression in Endometrial Carcinoma: Molecular and Morphologic Analysis of 6 Cases. Pai RK, Plesec TP, Abdul-Karim FW, Yang B, Marquard J, Shadrach B, Roma AR. Am J Surg Pathol. 2015 Mar 16. PMID: #25786082#
methylene blue-assisted technique for harvesting lymph node
The methylene blue technique is recommended for harvesting LNs during gastric cancer surgery on the basis of both the quality and efficacy.
A methylene blue-assisted technique for harvesting lymph nodes after radical surgery for gastric cancer: a prospective, randomized, controlled study. Aoyama T, Fujikawa H, Cho H, Ogata T, Shirai J, Hayashi T, Rino Y, Masuda M, Oba MS, Morita S, Yoshikawa T. Am J Surg Pathol. (...)
Ciliated muconodular papillary tumors (CMPTs)
Ciliated muconodular papillary tumors (CMPTs) are rare peripheral nodules of the lung first described in 2002.
Histologically, CMPTs showed glandular and/or papillary architecture, comprising a vaguely organized mixture of nonatypical ciliated columnar cells, mucous cells, and basal cells, often enveloped by copious intra-alveolar mucin.
Micropapillary tufts of ciliated cells and seemingly discontinuous growth along alveolar walls were (...)
Although pesticides are subject to extensive carcinogenicity testing before regulatory approval, pesticide exposure has repeatedly been associated with various cancers. This suggests that pesticides may cause cancer via non-mutagenicity mechanisms.
Pesticides may modify gene promoter DNA methylation levels, suggesting that epigenetic mechanisms may contribute to pesticide-induced carcinogenesis.
Pesticides are widely used in our environment [Weichenthal et al. 2010]. Although pesticides (...)