Trametinib Therapy for Hypertrophic Cardiomyopathy and Pulmonary Hypertension in a Child With RAF1-Related Noonan Syndrome (p.Ser257Leu): A Case Report. Read more about Trametinib Therapy for Hypertrophic Cardiomyopathy and Pulmonary Hypertension in a Child With RAF1-Related Noonan Syndrome (p.Ser257Leu): A Case Report.