Intrinsic resistance alterations are dominantly located downstream or upstream of a targeted protein.
Acquired resistance alterations dominantly involve lesions in a targeted protein or target-like proteins.
Intrinsic resistance evolves as a stochastic process early during tumorogenesis.
Acquired resistance evolves as a therapy-directed and adaptive selection of alterations.
Intrinsic and acquired resistance alterations should be pursued on a different panel of biomarkers.