Alpelisib for Lymphatic Malformations with PIK3CA Mutation

This study is testing a drug called alpelisib for people with lymphatic malformations (abnormal growths of the lymphatic system) that have a specific genetic change called a PIK3CA mutation. The study aims to see if alpelisib can shrink these malformations and improve symptoms compared to a placebo (an inactive substance). Adults and children aged 0 to 100 years can participate if they have a PIK3CA mutation. The main goal is to measure how much the malformations respond to treatment after 24 weeks. The study is currently recruiting 232 participants.

Study design
This is a multi-center study with two stages. Stage 1 is open-label (everyone knows what treatment they are getting) to find the right dose, and Stage 2 is randomized, double-blind (neither you nor your doctor will know if you are receiving alpelisib or placebo), and placebo-controlled.
What's involved
You will need to remain at the clinical site as required by the study and follow all study restrictions and examination schedules. The core treatment phase in Stage 1 and Stage 2 is 24 weeks.
Compensation
Not stated in the trial record.
Follow-up
Radiological response will be measured at Baseline and Week 24 of Stage 2.

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NCT05948943

Alpelisib in Pediatric and Adult Patients With Lymphatic Malformations Associated With a PIK3CA Mutation.

Recruiting
PHASE2Ages 0+InterventionalTreatment
Novartis Pharmaceuticals
~232 participants
Updated 2026-08-18 on ClinicalTrials.gov
What's tested:AlpelisibPlacebo

At a glance

Recruiting sites
60 of 61 listed sites are recruiting right now
RecruitingSuspended, closed, or not yet open
What they're measuring
Stage 2:Radiological response rate at Week 24 of Stage 2 (adult and pediatric (6 - 17 years of age) participants)
Measured over Baseline, Week 24
Lymphatic Malformations
61 sites across 34 states
France12
Ohio4
Spain4
California3
Pennsylvania2
Texas2
Buenos Aires2
New South Wales2
  • Novartis Pharmaceuticals · STUDY_DIRECTOR · Novartis Pharmaceuticals

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  • Stage 2:Radiological response rate at Week 24 of Stage 2 (adult and pediatric (6 - 17 years of age) participants)Baseline, Week 24

    Radiological response defined by achieving at least 20% reduction in the sum of target lesion volumes (1 to 3 lesions), assessed by MRI by a BIRC at Week 24, provided that none of the individual target lesions has at least 20% increase from baseline and in absence of progression of non-target lesions and without new lesions. The percentage of participants with a radiological response at Week 24 of Stage 2 in adult and pediatric (6-17 years of age) groups will be assessed