Renal tubular dysgenesis due to variants in the gene encoding ACE in a child surviving the neonatal period.

Autosomal recessive renal tubular dysgenesis (RTD) is a rare genetic disorder caused by defects in the renin-angiotensin system, with the most common outcomes being foetal or neonatal death from renal failure, pulmonary hypoplasia and/or refractory arterial hypotension. A small proportion of patients survive past the neonatal period. We present the case of a toddler with RTD due to compound heterozygous variants in the gene that codes for ACE, who has not required renal replacement therapy to date and in whom fludrocortisone has achieved electrolyte and acid/base balance.