Extramedullary T-lymphoblastic blast crisis in a young male with chronic myeloid leukemia: A rare presentation diagnosed on cytology and flow cytometric immunophenotyping.

The present report, besides highlighting the utility of FNA cytology in rendering such challenging diagnoses, also reiterates the significance of ancillary techniques, such as flow cytometry, which play a key role in early diagnosis and exact characterization of such rare and aggressive hematolymphoid neoplasms.