Prolonged remission in a child with chronic myeloid leukemia following Parvo virus B19 (B19V) infection

Area of Science:

• Hematology
• Virology
• Oncology

Background:

• Parvovirus B19 (B19V) is known to cause various disorders based on host immunity.
• Chronic myeloid leukemia (CML) is a myeloproliferative neoplasm.
• Hydroxyurea is a common treatment for CML.

Observation:

• A child with CML in remission on hydroxyurea developed severe erythroid suppression after B19V infection.
• The patient required multiple blood transfusions and discontinuation of hydroxyurea.
• The child remained in clinical and hematological remission until anti-B19V antibodies developed.

Findings:

• B19V infection can lead to profound erythroid suppression.
• This case demonstrates B19V's potential to suppress a neoplastic myeloid clone.
• This myeloid clone suppression by B19V is a previously undescribed phenomenon.

Implications:

• Parvovirus B19 may have an unexpected role in managing certain hematological malignancies.
• Further research is warranted to explore the interaction between B19V and neoplastic myeloid cells.
• This finding opens new avenues for understanding viral-induced remission in cancer.