Hemophagocytic lymphohistiocytosis onset during induction therapy for precursor B-cell acute lymphoblastic leukemia

Area of Science:

• Pediatric Oncology
• Hematology
• Immunology

Background:

• Acute lymphoblastic leukemia (ALL) is a common childhood cancer.
• Chemotherapy for ALL can have serious side effects.
• Hemophagocytic lymphohistiocytosis (HLH) is a life-threatening hyperinflammatory syndrome.

Observation:

• A child with precursor B-cell ALL developed fever, hepatosplenomegaly, and refractory thrombocytopenia post-chemotherapy.
• Bone marrow examination revealed hemophagocytosis, meeting HLH criteria.
• The patient presented with clinical, laboratory, and histopathologic evidence of HLH.

Findings:

• The child's symptoms significantly improved with an increased dosage of steroids.
• This suggests steroids may be effective in managing chemotherapy-induced HLH in pediatric ALL patients.
• Early recognition and intervention are crucial for managing HLH complications.

Implications:

• This case highlights the importance of recognizing HLH as a potential complication of ALL chemotherapy.
• Increased steroid dosage may be a viable therapeutic option for HLH in this context.
• Further research into the management of HLH in pediatric oncology patients is warranted.