Isolated Central Nervous System Infiltrated and Progressed to Acute Myeloid Leukemia from Chronic Myeloid Leukemia with e1a3 BCR-ABL1 Transcript: A Rare Case Report and Literature Review.

The chronic myeloid leukemia (CML) is easily diagnosed by laboratory examination, however, rare BCR-ABL1 mRNA transcripts variants, such as e1a3 present diagnosis and therapeutic challenges. This case report details the diagnosis and management of a CML patient with the e1a3 transcript by FISH and RT-PCR. Following initial diagnosis, the patient was treated with the tyrosine kinase inhibitor (TKI) Flumatinib.