CPS1 and ornithine carbamoyltransferase deficiency: SLEs may be observed in carbamoyl phosphate synthetase I (CPS1) deficiency, ornithine transcarbamylase (OTC) deficiency and citrullinemia [3,49,50,51,52,53,54,55,56,57,58,59,60,61,62,63,64,65,66].