A Challenging Presentation of Mycoplasma pneumoniae: Mild Hepatic Dysfunction With Persistent Leukocytosis in a

Robert J Heins1, Sierra Scott2, Stephen Mock3

  • 1Kansas City University College of Osteopathic Medicine Kansas City Missouri USA.

Clinical Case Reports
|April 29, 2026
PubMed

Insights

This case study shows a rare instance of Mycoplasma pneumoniae (MP) causing liver issues in a child. Early diagnosis and treatment with azithromycin resolved the hepatic dysfunction and anemia.

Area of Science:

  • Pediatrics
  • Infectious Diseases
  • Hepatology

Background:

  • Mycoplasma pneumoniae (MP) is a common pediatric respiratory pathogen.
  • MP can rarely cause extrapulmonary manifestations, including hepatic involvement.
  • Recognizing hepatic dysfunction in MP infections is crucial for diagnosis and treatment.

Purpose of the Study:

  • To highlight a rare case of Mycoplasma pneumoniae presenting with hepatic dysfunction in a pediatric patient.
  • To emphasize the importance of considering atypical MP presentations for timely diagnosis and management.
  • To illustrate the diagnostic challenges and successful treatment of MP-associated hepatitis.

Main Methods:

  • Case report of a five-year-old female with asthma presenting with symptoms suggestive of hepatic involvement.
  • Laboratory evaluation including complete blood count, liver function tests, coagulation profile, and MP serology.
  • Clinical observation during empiric antibiotic treatment and subsequent targeted therapy.

Main Results:

  • The patient presented with fever, cough, jaundice, elevated liver enzymes, direct hyperbilirubinemia, coagulopathy, and anemia.
  • Initial workup for infectious and hepatic causes was inconclusive.
  • Initiation of azithromycin following positive MP IgM serology correlated with the normalization of hepatic indices and hematologic parameters.

Conclusions:

  • Mycoplasma pneumoniae can present with rare extrapulmonary manifestations, including mild hepatic dysfunction and transient hematologic changes.
  • Atypical presentations of MP necessitate a high index of suspicion for accurate diagnosis.
  • Timely diagnosis and appropriate antibiotic therapy (azithromycin) can effectively manage MP-associated hepatic dysfunction, preventing prolonged hospitalization.

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