Cell of origin of hairy cell leukemia is -
Hairy cell leukaemia is an unusual & uncommon form of B cell malignancy characterized by presence of hairy cells in the blood & bone marrow & splenomegaly.Hairy cells are abnormal mononuclear cells with hairy cytoplasmic projections which are seen in blood,bone marrow & spleen.These cells exhibit CD19,CD20 & CD22 antigen.Reference: Harsh mohan textbook of pathology 6 th edition pg no 379
B-cell
T-cell
NK-cell
Dendritic reticulum cell
Haematology