SLC25A20 and carnitine-acylcarnitine translocase deficiency: <b>Introduction:</b> Carnitine-acylcarnitine translocase deficiency (CACTD) is a rare and life-threatening autosomal recessive disorder of mitochondrial fatty acid oxidation caused by variation of the Solute carrier family 25 member 20 (<i>SLC25A20</i>) gene.