In an ensemble piece, Dr Saskia Wortmann, Dr Hud Freeze, and Dr Santiago Ramón-Maiques discuss CAD deficiency and the challenge of finding new ways to validate genetic variants when pathogenicity seems uncertain. Beyond genetics: Deciphering the impact of missense variants in CAD deficiencyFrancisco del Caño-Ochoa, et alhttps://doi.org/10.1002/jimd.12667