Hemophagocytic lymphohistiocytosis in infants: a single center experience from India

Mohammed Ramzan1, Satya Prakash Yadav, Gaurav Kharya

  • 11Pediatric Hematology Oncology & Bone Marrow Transplant Unit, Department of Pediatrics, Institute of Child Health, Sir Ganga Ram Hospital , Old Rajinder Nagar, New Delhi , India.

Insights

Outcome data for infant hemophagocytic lymphohistiocytosis (HLH) in India is scarce. Stem cell transplant (SCT) is feasible for familial HLH in developing nations, but challenges like sepsis persist.

Area of Science:

  • Pediatric Hematology
  • Immunology
  • Genetics

Background:

  • Limited outcome data exists for infant hemophagocytic lymphohistiocytosis (HLH) in India, particularly after stem cell transplantation (SCT).
  • This study presents outcome data for eight infants diagnosed with HLH in India.

Observation:

  • The mean age of infants was 7.1 months.
  • Mutation analysis revealed genetic causes in seven patients, including Griscelli syndrome and homozygous mutations in Perforin, Munc, and STX11 genes.
  • Three patients had no identifiable mutations.

Findings:

  • All patients were treated according to the HLH 2004 protocol.
  • Four infants died during induction therapy, and one abandoned treatment.
  • Two infants underwent SCT; one is awaiting SCT.
  • One patient achieved disease-free survival 22 months post-SCT with a matched sibling donor.
  • Another patient died 5 months post-unrelated double cord blood transplant due to renal failure.

Implications:

  • Stem cell transplantation (SCT) is a feasible treatment option for infants with familial HLH in developing countries.
  • Significant barriers, including sepsis and disease refractoriness, must be addressed to improve SCT outcomes in this population.