Signet ring cell
histology, a signet ring cell is a malignantcell type seen predominantly in carcinomas. Signet ring cells are most frequently associated with stomach cancer, [Cancer Research UK. Signet Ring Cancer. cancerhelp.org.uk. URL: [http://www.cancerhelp.org.uk/help/default.asp?page=7581 http://www.cancerhelp.org.uk/help/default.asp?page=7581] . Accessed on: November 2, 2007.] but can arise from any number of tissues including the prostate, [cite journal |author=Leong FJ, Leong AS, Swift J |title=Signet-ring carcinoma of the prostate |journal=Pathol. Res. Pract. |volume=192 |issue=12 |pages=1232–8; discussion 1239–41 |year=1996 |pmid=9182294 |doi=] bladder, gallbladder, [cite journal |author=Jain V, Gupta K, Kudva R, Rodrigues GS |title=A case of ovarian metastasis of gallbladder carcinoma simulating primary ovarian neoplasm: diagnostic pitfalls and review of literature |journal=Int. J. Gynecol. Cancer |volume=16 Suppl 1 |issue= |pages=319–21 |year=2006 |pmid=16515613 |doi=10.1111/j.1525-1438.2006.00335.x] breast, colon, [cite journal |author=Makino T, Tsujinaka T, Mishima H, "et al" |title=Primary signet-ring cell carcinoma of the colon and rectum: report of eight cases and review of 154 Japanese cases |journal=Hepatogastroenterology |volume=53 |issue=72 |pages=845–9 |year=2006 |pmid=17153438 |doi=] ovarian stroma and testis. [cite journal |author=Michal M, Hes O, Kazakov DV |title=Primary signet-ring stromal tumor of the testis |journal=Virchows Arch. |volume=447 |issue=1 |pages=107–10 |year=2005 |pmid=15909171 |doi=10.1007/s00428-005-1218-2]
The name of the cell comes from its appearance; signet ring cells resemble
signet rings. They contain a large amount of mucin, which pushes the nucleus to the cell periphery. The pool of mucin in a signet ring cell mimics the appearance of a fingerhole and the nucleus mimics the appearance of the face of the ring in profile.
A significant number of signet ring cells, generally, are associated with a worse
prognosis. [cite journal |author=Lee WS, Chun HK, Lee WY, "et al" |title=Treatment outcomes in patients with signet ring cell carcinoma of the colorectum |journal=Am. J. Surg. |volume=194 |issue=3 |pages=294–8 |year=2007 |pmid=17693269 |doi=10.1016/j.amjsurg.2006.12.041] [Cabebe EC, Mehta VK, Fisher G. Gastric Cancer. eMedicine.com. URL: [http://www.emedicine.com/med/topic845.htm http://www.emedicine.com/med/topic845.htm] . Accessed on: November 8, 2007.]
SRC carcinomas can be classified using
immunohistochemistry. [cite journal |author=Tian MM, Zhao AL, Li ZW, Li JY |title=Phenotypic classification of gastric signet ring cell carcinoma and its relationship with clinicopathologic parameters and prognosis |journal=World J. Gastroenterol. |volume=13 |issue=23 |pages=3189–98 |year=2007 |pmid=17589897 |doi=]
* [http://library.med.utah.edu/WebPath/GIHTML/GI029.html Signet ring cells] - med.utah.edu.
* [http://www.engravingarts.com/sales/LVX2.jpgPictures of a signet ring] - engravingart.com.
* [http://www.cancer.gov/Templates/db_alpha.aspx?CdrID=44297 Signet ring cell definition] - cancer.gov.
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signet ring cell — n a cell that has its nucleus shifted to one side by a large cytoplasmic vacuole and that occurs esp. in mucin producing adenocarcinomas esp. of the stomach * * * a cell in which the nucleus has been pressed to one side by an accumulation of… … Medical dictionary
signet-ring cell — Cell (adipocyte) with a large central fat filled vacuole that pushes the nucleus to one side to give an appearance reminiscent of a signet ring … Dictionary of molecular biology
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signet ring cell carcinoma — a type of highly malignant, mucus secreting tumor usually found in the stomach or intestine; the mucus secreting cells called signet ring cells are anaplastic … Medical dictionary
signet ring cell carcinoma — A highly malignant type of cancer typically found in glandular cells that line the digestive organs. The cells resemble signet rings when examined under a microscope … English dictionary of cancer terms
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