Identification of Novel Variants in the NHS in Four Turkish Patients With Nance-Horan Syndrome.

Nance-Horan Syndrome (NHS) is an ultra-rare syndrome characterized by facial dysmorphism, teeth, and eye abnormalities. Pathogenic variants in NHS are responsible for NHS. Herein, we report four Turkish patients from two unrelated families having dysmorphic facial features, congenital bilateral cataracts, and dental anomalies. Molecular studies revealed two novel hemizygous (c.136_137del; p.Leu46Glyfs*136 and c.2690del; p.Thr897Serfs*19) variants in the NHS inherited from their mothers. In family 1, the mother and her children also carried a heterozygous known c.645G>A (p.Trp215*) AIPL1 variant, which explains the cone-rod dystrophy (CRD). This is the first report documenting the coexistence of NHS and AIPL1-related CRD.