ATP6V1G1 and Cowden syndrome 1: Within the shared CS surface signature identified in the present study, upregulated proteins, such as V‐type proton ATPase subunit G 1 (ATP6V1G1) and lysosomal protein Lysosome‐associated membrane glycoprotein 1 (LAMP1) have been previously linked to CS (Kang et al., 2017; Rovira et al., 2022).