PRKACA and adenoma: Recently, mutations have also been found in PRKAR1A (126), a gene mutated in PPNAD (as discussed in Section “Primary Pigmented Nodular Adrenocortical Disease and Related Mouse Models”) and much more rarely in ACAs (as discussed in Section “Cortisol-Producing Adenomas: PKA Pathway, PRKACA Mutations, and Lack of Mouse Models”).