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 ORIGINAL ARTICLE
Year : 2010  |  Volume : 56  |  Issue : 4  |  Page : 262-266

p53, carcinoembryonic antigen and carbohydrate antigen 19.9 expression in gall bladder cancer, precursor epithelial lesions and xanthogranulomatous cholecystitis


1 Department of Pathology, Sanjay Gandhi, Postgraduate Institute of Medical Sciences, Lucknow, Uttar Pradesh, India
2 Department of Medical Genetics, Sanjay Gandhi, Postgraduate Institute of Medical Sciences, Lucknow, Uttar Pradesh, India
3 Department of Surgical Gastroenterology, Sanjay Gandhi, Postgraduate Institute of Medical Sciences, Lucknow, Uttar Pradesh, India

Correspondence Address:
V Agrawal
Department of Pathology, Sanjay Gandhi, Postgraduate Institute of Medical Sciences, Lucknow, Uttar Pradesh
India
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Source of Support: None, Conflict of Interest: None


DOI: 10.4103/0022-3859.70933

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Background : Gallbladder cancer (GBC) is the commonest gastrointestinal cancer in women of north India. Precursor epithelial lesions in GBC are known; however, the role of xanthogranulomatous (XG) inflammation in the pathogenesis of GBC is unknown. Aims : To analyze the role of precursor lesions in the pathogenesis of GBC we studied the immunohistochemical (IHC) expression of p53, carcino-embryonic antigen (CEA) and carbohydrate antigen 19.9 (CA-19.9) in GBC, chronic cholecystitis (CC), XG cholecystitis (XGC) and precursor lesions. Materials and Methods : The study included 51 GBC, 68 CC, 42 XGC and 10 normal gallbladders. All cases were evaluated for presence of precursor lesions and IHC was performed. Results : p53 immunoreactivity was found in 55% GBC, 32% of dysplasia with malignancy and in 14% of dysplasia with CC. Sixteen percent GBC had associated XG inflammation. Normal and metaplastic epithelium in CC and in XGC did not express p53. CEA expression was apical in normal and inflammatory GBs (CC, XGC), while cytoplasmic focal to diffuse positivity was seen in 82% GBC. CA-19.9 expression was seen in all cases of normal and inflammatory GBs; however, foci of antral metaplasia were negative. Seventy-five percent of GBC expressed CA-19.9; all negative cases were high-grade on histology. Conclusions : Altered CEA expression is seen in GBC as compared to normal and inflammatory gallbladders. Loss of expression of CA19.9 in antral metaplasia and poorly differentiated GBC may indicate that it is a marker of biliary differentiation. p53 over-expression seen in GBC and in dysplasia associated with malignancy and with CC suggests that p53 mutation and dysplasia are early events in the evolution of GBC. Epithelial metaplasia and XG inflammation are often associated with GBC but do not appear to play a role in its pathogenesis through the p53 pathway.






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Online since 12th February '04
2004 - Journal of Postgraduate Medicine
Official Publication of the Staff Society of the Seth GS Medical College and KEM Hospital, Mumbai, India
Published by Wolters Kluwer - Medknow