Indian Journal of Pathology and Microbiology
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Year : 2014  |  Volume : 57  |  Issue : 1  |  Page : 9-12

Mutation profiling in gallbladder cancer in Indian population

1 Departments of Pathology and Surgical Gastroenterology, Sanjay Gandhi Postgraduate Institute of Medical Sciences, Lucknow, Uttar Pradesh, India
2 Department of Surgical Pathology, Histopathology and Shared Resource, Pathology Translational Research Laboratory, Portland, Oregon, USA
3 Department of Pathology Knight Cancer Institute, Oregon Health and Science University, Portland, Oregon, USA

Correspondence Address:
Niraj Kumari
Department of Pathology, Sanjay Gandhi Postgraduate Institute of Medical Sciences, Lucknow - 226 014, Uttar Pradesh, India

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Source of Support: None, Conflict of Interest: None

DOI: 10.4103/0377-4929.130849

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Aim: Gallbladder cancer is an aggressive malignancy usually diagnosed at late stage. The molecular genetics of this cancer is heterogeneous and not well established. Mutation profiling of gallbladder cancer was performed through massarray technology with an aim to identify molecular markers involved in the tumor pathogenesis that can be helpful as markers for early diagnosis and targets for therapy. Materials and Methods: Forty nine cases of gallbladder cancer were screened through Sequenom Massarray technology for 390 mutations across 30 genes in formalin fixed paraffin embedded archived tissues and the results of mutation profiling was correlated with tumor characteristics. Mutations were observed in 9 of 49 cases across four genes - TP53 (four cases), CTNNB1 (two cases), PIK3CA (two cases), and KRAS (one case). Six of these cases were well differentiated but of eight of them belonged to stage II to IV disease. Six cases had associated gallstones. Conclusion: The mutation frequency found in gallbladder cancer is comparable to the data available in literature. Identification of PIK3CA and KRAS mutations would help in formulating more efficacious targeted approach for management. Studies with large number of cases would help in exploring more targets and better classification of these cancers at genetic level.

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