Incidence of Periampullary Carcinoma as the Commonest Cause of Terminal CBD Obstruction – A Study Based on Computed Tomography Findings – Dr. Husna PC, Dr. Shameem Ahammed , Dr. Brahmadathan MN – Journal of Medical Science and clinical Research ISSN (e)-2347-176x ISSN (p) 2455-045, Vol||11||Issue||02||Page 91-95||February 2023