Isolated central nervous system relapse in chronic myeloid leukemia

Area of Science:

• Hematology
• Oncology
• Neurology

Background:

• Chronic myeloid leukemia (CML) is a myeloproliferative neoplasm with distinct phases: chronic, accelerated, and blastic.
• Central nervous system (CNS) involvement in CML is rare, particularly without bone marrow relapse.
• Infectious meningoencephalitis is an inflammation of the brain and meninges.

Purpose of the Study:

• To report an extremely rare case of CML blast crisis involving the CNS.
• To investigate CNS involvement in a patient with prior complete cytogenetic remission.
• To explore the potential link between infectious meningoencephalitis and CML blast crisis.

Main Methods:

• Case report detailing a patient's clinical course.
• Review of medical history, including CML treatment and remission status.
• Analysis of CNS involvement in the context of prior bone marrow remission and infectious triggers.

Main Results:

• The patient, in long-term complete cytogenetic remission of CML in the bone marrow, developed CNS blast crisis.
• This CNS blast crisis occurred subsequent to an episode of infectious meningoencephalitis.
• Bone marrow involvement was absent during the CNS blast crisis.

Conclusions:

• This case underscores the possibility of isolated CNS blast crisis in CML, even years after achieving remission.
• Infectious meningoencephalitis may serve as a potential trigger for CML blast phase in the CNS.
• Further research is warranted to understand the mechanisms and implications of CNS-specific CML relapse.