Signet ring cell

  In histology, a signet ring cell is a malignant cell type seen predominantly in carcinomas.

Signet ring cells are most frequently associated with stomach cancer,^[1] but can arise from any number of tissues including the prostate,^[2] bladder, gallbladder,^[3] breast, colon,^[4] ovarian stroma and testis.^[5]

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Appearance

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 finger hole and the nucleus mimics the appearance of the face of the ring in profile.

Diagnostic significance

A significant number of signet ring cells, generally, are associated with a worse prognosis.^[6][7]

Classification

SRC carcinomas can be classified using immunohistochemistry.^[8]

References

1. ^ Cancer Research UK. Signet Ring Cancer. cancerhelp.org.uk. URL: http://www.cancerhelp.org.uk/help/default.asp?page=7581. Accessed on: November 2, 2007.
2. ^ Leong FJ, Leong AS, Swift J (1996). "Signet-ring carcinoma of the prostate". Pathol. Res. Pract. 192 (12): 1232–8; discussion 1239–41. PMID 9182294.
3. ^ Jain V, Gupta K, Kudva R, Rodrigues GS (2006). "A case of ovarian metastasis of gallbladder carcinoma simulating primary ovarian neoplasm: diagnostic pitfalls and review of literature". Int. J. Gynecol. Cancer 16 Suppl 1: 319–21. doi:10.1111/j.1525-1438.2006.00335.x. PMID 16515613.
4. ^ Makino T, Tsujinaka T, Mishima H, et al (2006). "Primary signet-ring cell carcinoma of the colon and rectum: report of eight cases and review of 154 Japanese cases". Hepatogastroenterology 53 (72): 845–9. PMID 17153438.
5. ^ Michal M, Hes O, Kazakov DV (2005). "Primary signet-ring stromal tumor of the testis". Virchows Arch. 447 (1): 107–10. doi:10.1007/s00428-005-1218-2. PMID 15909171.
6. ^ Lee WS, Chun HK, Lee WY, et al (2007). "Treatment outcomes in patients with signet ring cell carcinoma of the colorectum". Am. J. Surg. 194 (3): 294–8. doi:10.1016/j.amjsurg.2006.12.041. PMID 17693269.
7. ^ Cabebe EC, Mehta VK, Fisher G. Gastric Cancer. eMedicine.com. URL: http://www.emedicine.com/med/topic845.htm. Accessed on: November 8, 2007.
8. ^ Tian MM, Zhao AL, Li ZW, Li JY (2007). "Phenotypic classification of gastric signet ring cell carcinoma and its relationship with clinicopathologic parameters and prognosis". World J. Gastroenterol. 13 (23): 3189–98. PMID 17589897.