Annals of Coloproctology

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Case Report

Synchronous Primary Anorectal Melanoma and Sigmoid Adenocarcinoma: Inju Cho, Kyung Jong Kim, Sung-Chul Lim; Ann Coloproctol. 2016;32(5):190-194. Published online October 31, 2016; DOI: https://doi.org/10.3393/ac.2016.32.5.190

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A primary anorectal malignant melanoma is a rare tumor. Moreover, cases involving a synchronous anorectal melanoma and colon adenocarcinoma are extremely rare. The authors report a case of a synchronous anorectal melanoma and sigmoid adenocarcinoma in an 84-year-old man. The regions of the anorectal melanoma showed melanocytic nevi in the adjacent mucosa of the anal canal and rectum. A dysplastic nevus was also identified in the anal mucosa. This case demonstrates that an anorectal melanoma can arise from pre-existing anorectal melanocytic lesions.

Citations

Citations to this article as recorded by

Anorectal melanoma: systematic review of the current literature of an aggressive type of melanoma
Giovanni Paolino, Antonio Podo Brunetti, Carolina De Rosa, Carmen Cantisani, Franco Rongioletti, Andrea Carugno, Nicola Zerbinati, Mario Valenti, Domenico Mascagni, Giulio Tosti, Santo Raffaele Mercuri, Riccardo Pampena
Melanoma Research.2024; 34(6): 487. CrossRef
Endoscopic diagnosis of gastrointestinal melanoma
Sheng Wang, Siyu Sun, Xiang Liu, Nan Ge, Guoxin Wang, Jintao Guo, Wen Liu, Jinlong Hu
Scandinavian Journal of Gastroenterology.2020; 55(3): 330. CrossRef

Original Article

Prognostic Implication of 15-Hydroxyprostaglandin Dehydrogenase Down-Regulation in Patients with Colorectal Cancer: Pil Sung Kang, Jin Ha Kim, Ok In Moon, Sung Chul Lim, Kyung Jong Kim; J Korean Soc Coloproctol. 2012;28(5):253-258. Published online October 31, 2012; DOI: https://doi.org/10.3393/jksc.2012.28.5.253

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Abstract PDF

Purpose

Prostaglandin (PG) E2 is known to be closely related to cancer progression and is inactivated by 15-hydroxyprostaglandin dehydrogenase (PGDH). 15-PGDH is shown to have tumor suppressor activity and to be down-regulated in various cancers, including colorectal cancer (CRC). Therefore, we evaluated the expression of 15-PGDH and its prognostic effect in patients with CRC.

Methods

15-PGDH expression was examined by using immunohistochemistry in 77 patients with CRC. Its prognostic significance was statistically evaluated.

Results

Negative 15-PGDH expression was noted in 55.8% of the 77 cases of CRC. 15-PGDH expression showed no correlation with any of the various clinicopathologic parameters. The status of lymph node metastasis, tumor-node-metastasis stages, and pre-operative carcinoembryonic antigen levels showed significant prognostic effect. However, univariate analysis revealed down-regulation of 15-PGDH not to be a predictor of poor survival. The 5-year overall survival rate was 71.7% in the group with positive expression of 15-PGDH and 67.1% in the group with negative expression of 15-PGDH, but this difference was not statistically significant (P = 0.751).

Conclusion

15-PGDH was down-regulated in 55.8% of the colorectal cancer patients. However, down-regulation of 15-PGDH showed no prognostic value in patients with CRC. Further larger scale or prospective studies are needed to clarify the prognostic effect of 15-PGDH down-regulation in patients with colorectal cancer.

Citations

Citations to this article as recorded by

The tumor suppressor role and epigenetic regulation of 15-hydroxyprostaglandin dehydrogenase (15-PGDH) in cancer and tumor microenvironment (TME)
SubbaRao V. Tulimilli, Medha Karnik, Anjali Devi S. Bettadapura, Olga A. Sukocheva, Edmund Tse, Gowthamarajan Kuppusamy, Suma M. Natraj, SubbaRao V. Madhunapantula
Pharmacology & Therapeutics.2025; 268: 108826. CrossRef
Molecular Targets in Precision Chemoprevention of Colorectal Cancer: An Update from Pre-Clinical to Clinical Trials
Nagendra S. Yarla, Venkateshwar Madka, Gopal Pathuri, Chinthalapally V. Rao
International Journal of Molecular Sciences.2020; 21(24): 9609. CrossRef

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