...Quantitative change in the sum of Response Evaluation Criteria in Solid Tumors (RECIST) - measurable index lesions on paired, pre-and post-treatment computed tomography scans (delta change in T)`Will compare quantitative change in tumor size (change in T) in patients with genomic PIK3CA pathway alteration (PIK3CA mutation, amplification, and fluorescence in situ hybridization [FISH] for PTEN loss) versus no genomic activation.`...