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Pure red cell aplasia and hepatitis in a child receiving isoniazid therapy

K S Veale1, E S Huff, B K Nelson

  • 1Department of Emergency Medicine, Texas Tech Univesity, El Paso.

Insights

Isoniazid therapy in a child caused pure red cell aplasia, a condition typically seen in adults, and rare hepatitis in a pediatric patient.

Area of Science:

  • Pediatric Hematology
  • Hepatology
  • Pharmacology

Background:

  • Isoniazid is a first-line antituberculosis medication.
  • Adverse drug reactions to isoniazid are well-documented but vary in presentation.
  • Pediatric-specific adverse events require careful monitoring and reporting.

Observation:

  • A 7-year-old boy developed severe anemia and liver inflammation while undergoing isoniazid treatment.
  • The patient presented with pure red cell aplasia (PRCA), a rare bone marrow disorder.
  • Clinically significant hepatitis, uncommon in children, was also observed.

Findings:

  • This case highlights the occurrence of PRCA in a pediatric patient receiving isoniazid, a complication previously reported primarily in adults.
  • The concurrent development of hepatitis in this child underscores the potential for serious hepatic toxicity from isoniazid in younger populations.
  • The combination of PRCA and hepatitis represents a rare and severe adverse drug reaction profile.

Implications:

  • This case expands the known spectrum of isoniazid-induced complications in children.
  • It emphasizes the need for heightened vigilance and monitoring for both hematologic and hepatic toxicities in pediatric patients treated with isoniazid.
  • Further research may be warranted to understand the mechanisms and risk factors for these rare adverse events in children.

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