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Title: | Evaluation of mismatch repair and microsatellite instability in colorectal cancer patients in Kuantan, Pahang | Authors: | Muhammad Ishaque Faizee | Supervisor: | Asmah Hanim Hamdan, Ph.D Norlelawati A. Talib, Ph.D |
Subject: | Colon (Anatomy) -- Cancer -- Malaysia Colon (Anatomy) -- Diseases -- Diagnosis -- Malaysia |
Year: | 2021 | Publisher: | Kuantan, Pahang : Kulliyyah of Science, International Islamic University Malaysia, 2021 | Abstract in English: | Colorectal cancer (CRC) is the second most common tumour in Malaysia. Universal screening for the identification of microsatellite instability/mismatch repair (MSI/MMR) status in CRC patients is recommended by several guidelines. The detection of MSI/MMR status in CRC patients is not only essential to identify Lynch Syndrome (LS), but it also has predictive and prognostic values. The study aimed to investigate the MMR and MSI status among CRC patients in Kuantan, Pahang as well as to assess the consistency between immunohistochemistry (IHC) and MSI analysis. Formalin-fixed paraffin-embedded (FFPE) tissue blocks of 123 CRC patients were retrieved for the years 2017-2018. For IHC and MSI analysis, EnVisionTM FLEX, Mini Kit, High PH, and MSI Analysis System 1.2 (Promega) were utilized, respectively. MSI analysis was performed on selected deficient mismatch repair (dMMR) and proficient mismatch repair (pMMR) cases. IHC detected 11.4% (14 out of 123) patients as dMMR and 88.6% (109 out of 123) as pMMR. MSI analysis identified 26% (13 out of 50) patients as MSI-H, 6% (3 out of 50) patients as MSI-L, and 64% (32 out of 50) patients as MSS. Both the IHC and MSI analysis showed perfect agreement (0.896, Kappa value) for the recognition of dMMR or MSI-H CRC patients while demonstrating only 4% (2 out of 50) discordant results. Almost all dMMR patients detected by IHC were recognized by MSI analysis as MSI-H except one. The significant prevalence of dMMR in current cohort support the recommendation that the assessment of MSI/MMR status should be addressed in CRC patients. The selection of the choice method may be based on the availability of the expertise and equipment. Since IHC is an affordable, a reproducible and readily available in most histopathological laboratories, it can be used as a primary screening test to detect MSI/MMR status in CRC patients. | Call Number: | t RC 280 C6 M9522E 2021 | Kullliyah: | Kulliyyah of Science | Programme: | Master of Medical Sciences | URI: | http://studentrepo.iium.edu.my/handle/123456789/10782 |
Appears in Collections: | KOS Thesis |
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File | Description | Size | Format | |
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t11100392685MuhammadIshaqueFaizee_24.pdf | 24 pages file | 1.18 MB | Adobe PDF | View/Open |
t11100392685MuhammadIshaqueFaizee_SEC.pdf Restricted Access | Full text secured file | 4.48 MB | Adobe PDF | View/Open Request a copy |
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