For PKD2 the authors concluded that all patients with PKD2 large deletions or loss of function mutations had an ADPKD diagnosis following imaging analysis, but this was not reflected in the ICD9/10 terms [5], indicating the need for genetic testing and image review rather than just relying on ICD9/10 terms for an accurate diagnosis of ADPKD. The gene discussed is PKD2; the disease is autosomal dominant polycystic kidney disease.