Urofacial syndrome (MIM 615112) is a rare clinically and genetically heterogeneous autosomal recessive condition. It is caused by biallelic variants in LRIG2 and HPSE2.
The condition is under ascertained and there are only very few published reports of affected individuals.
Affected individuals have severe urinary bladder voiding dysfunction. The external urinary sphincter fails to relax resulting in increased bladder pressure which can result in vesico-ureteric reflux, dilated ureters and hydronephrosis. Affected individuals may be identified prenatally due to an enlarged bladder or with recurrent urinary tract infections, incontinence or renal impairment.
Affected individuals may also have significant bowel voiding problems resulting in constipation.
A characteristic grimace is present on attempts to smile.
LRIG2