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Article

Clinicopathological observations of colorectal serrated lesions associated with invasive carcinoma and high-grade intraepithelial neoplasm

  • Authors:
    • Sheng Xu
    • Luping Wang
    • Guangzhi Yang
    • Lin Li
    • Jin Wang
    • Chunwei Xu
    • Chang Ge
  • View Affiliations / Copyright

    Affiliations: Department of Pathology, General Hospital of Beijing PLA Military Region, Beijing 100700, P.R. China
  • Pages: 1113-1120
    |
    Published online on: August 23, 2013
       https://doi.org/10.3892/etm.2013.1270
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Abstract

The aim of this study was to investigate the clinicopathological characteristics of colorectal serrated lesions associated with invasive carcinoma and high-grade intraepithelial neoplasm (HIN), as well as to determine the immunohistochemical expression of MutL homolog 1 (MLH1), MutS homolog 2 (MSH2), K-ras and O6-methylguanine-DNA methyltransferase (MGMT). A total of 5,347 cases diagnosed with colorectal polyp or adenoma were included in this study from October 2002 to September 2009. A total of 16 cases of colorectal serrated lesions associated with invasive carcinoma/HIN were screened. These comprised seven cases of traditional serrated adenoma (TSA) associated with invasive carcinoma and HIN, six cases of sessile serrated adenoma (SSA) associated with invasive carcinoma/HIN and three cases of hyperplastic polyp (HP) associated with invasive carcinoma/HIN. TSA associated with invasive carcinoma/HIN predominantly occurred in the rectum with a clearly serrated structure and ectopic crypts. High-grade dysplasia was observed in filiform TSA, which was more prone to carcinogenesis. SSA associated with invasive carcinoma/HIN mainly occurred in the ileocecal junction, with the SSA serrated glands closely located adjacent to the muscularis mucosa and the basal crypt expanded with inverted T- or L-shaped branches. HPs were observed in three cases in the cancer-adjacent tissues with invasive carcinoma, while a HP-SSA/TSA-carcinoma sequence was found in two cases. Immunohistochemistry showed that MGMT expression was significantly different in the serrated lesion tissues compared with that in cancer tissues (P=0.022), control cancer tissues (P=0.002) and normal colorectal epithelial tissues (P=0.003). TSA and SSA may progress to cancer or directly develop into invasive adenocarcinoma. Filiform TSA easily develops into HIN, followed by infiltration. HP may arise from the cancer‑adjacent tissues of the invasive carcinoma, which are closely adjacent to the cancer tissues. Further research is needed to investigate the potential direct involvement of HP in carcinogenesis.
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Copy and paste a formatted citation
Spandidos Publications style
Xu S, Wang L, Yang G, Li L, Wang J, Xu C and Ge C: Clinicopathological observations of colorectal serrated lesions associated with invasive carcinoma and high-grade intraepithelial neoplasm. Exp Ther Med 6: 1113-1120, 2013.
APA
Xu, S., Wang, L., Yang, G., Li, L., Wang, J., Xu, C., & Ge, C. (2013). Clinicopathological observations of colorectal serrated lesions associated with invasive carcinoma and high-grade intraepithelial neoplasm. Experimental and Therapeutic Medicine, 6, 1113-1120. https://doi.org/10.3892/etm.2013.1270
MLA
Xu, S., Wang, L., Yang, G., Li, L., Wang, J., Xu, C., Ge, C."Clinicopathological observations of colorectal serrated lesions associated with invasive carcinoma and high-grade intraepithelial neoplasm". Experimental and Therapeutic Medicine 6.5 (2013): 1113-1120.
Chicago
Xu, S., Wang, L., Yang, G., Li, L., Wang, J., Xu, C., Ge, C."Clinicopathological observations of colorectal serrated lesions associated with invasive carcinoma and high-grade intraepithelial neoplasm". Experimental and Therapeutic Medicine 6, no. 5 (2013): 1113-1120. https://doi.org/10.3892/etm.2013.1270
Copy and paste a formatted citation
x
Spandidos Publications style
Xu S, Wang L, Yang G, Li L, Wang J, Xu C and Ge C: Clinicopathological observations of colorectal serrated lesions associated with invasive carcinoma and high-grade intraepithelial neoplasm. Exp Ther Med 6: 1113-1120, 2013.
APA
Xu, S., Wang, L., Yang, G., Li, L., Wang, J., Xu, C., & Ge, C. (2013). Clinicopathological observations of colorectal serrated lesions associated with invasive carcinoma and high-grade intraepithelial neoplasm. Experimental and Therapeutic Medicine, 6, 1113-1120. https://doi.org/10.3892/etm.2013.1270
MLA
Xu, S., Wang, L., Yang, G., Li, L., Wang, J., Xu, C., Ge, C."Clinicopathological observations of colorectal serrated lesions associated with invasive carcinoma and high-grade intraepithelial neoplasm". Experimental and Therapeutic Medicine 6.5 (2013): 1113-1120.
Chicago
Xu, S., Wang, L., Yang, G., Li, L., Wang, J., Xu, C., Ge, C."Clinicopathological observations of colorectal serrated lesions associated with invasive carcinoma and high-grade intraepithelial neoplasm". Experimental and Therapeutic Medicine 6, no. 5 (2013): 1113-1120. https://doi.org/10.3892/etm.2013.1270
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