Department of Oncopathology forms the basis of cancer management by providing diagnostic and prognostic yields. The various sections within this department are Haematology, Biochemistry, Microbiology, Histopathology, Cytopathology and Blood banking services. The department is the pioneer in the fields of IHC and flow-cytometry services in North East India. We have also started the in-situ hybridization (ISH) for the detection of Epstein-Barr virus in tissue sections. Blood Bank of BBCI was granted a valid license from Drug Controller General of India (CDSCO) in 2008 for whole blood. The license for blood components was granted in 2012. Recently Apheresis unit has been also started at blood bank of BBCI. NABL has accredited the Haematology and Biochemistry sections of the department in October, 2022.