Sirolimus in Infants with Multiple Cardiac Rhabdomyomas Associated with Tuberous Sclerosis Complex

Maurizio Lucchesi1, Enrico Chiappa2, Flavio Giordano3

  • 1Neuro-Oncology Unit, Department of Pediatric Oncology, Meyer Children's University Hospital, Florence, Italy.

Insights

Sirolimus effectively reduced cardiac rhabdomyomas in infants with tuberous sclerosis. This mTOR inhibitor showed significant tumor reduction, offering a promising treatment for this rare condition.

Area of Science:

  • Cardiology
  • Oncology
  • Genetics

Background:

  • Cardiac rhabdomyomas are a common feature of tuberous sclerosis.
  • Tumor growth can lead to severe outcomes, including fetal or neonatal death in 10% of cases.

Observation:

  • Three infants under 12 months with cardiac rhabdomyomas were treated with sirolimus.
  • Sirolimus is an oral mTOR inhibitor used in this study.

Findings:

  • All patients experienced significant cardiac rhabdomyoma reduction.
  • Two patients achieved complete response, one had >50% debulking.
  • Median time to best response was 1.9 months; side effects were acceptable.

Implications:

  • Sirolimus may promote natural regression of cardiac rhabdomyomas.
  • Further prospective clinical trials are warranted to confirm efficacy and safety.
Abstract

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