Pallister-Hall-like syndrome (PHLS) is a pleiotropic autosomal recessive disorder characterized by phenotypic variability. Patients exhibit postaxial polydactyly as well as hypothalamic hamartoma, cardiac and skeletal anomalies, and craniofacial dysmorphisms. Hirschsprung disease has also been observed (Rubino et al., 2018; Le et al., 2020). Pallister-Hall syndrome (146510) is an autosomal dominant disorder with features overlapping those of PHLS, caused by mutation in the GLI3 gene (165240).

A single maxillary central incisor positioned in the midline with morphological symmetry of the crown and bordered by lateral incisors.

This syndrome has characteristics of anophthalmia or microphthalmia, retinal dystrophy, and/or myopia, associated in some cases with cerebral anomalies. It has been described in two families. Polydactyly may also be present. Linkage analysis allowed identification of mutations in the BMP4 gene, which has already been shown to play a role in eye development.

RHYNS syndrome is characterized by gaze palsy, retinitis pigmentosa, sensorineural hearing loss, hypopituitarism, nephronophthisis, and mild skeletal dysplasia (Di Rocco et al., 1997).

Non-acquired combined pituitary hormone deficiency-sensorineural hearing loss-spine abnormalities syndrome is a rare, genetic, non-acquired, combined pituitary hormone deficiency disorder characterized by panhypopituitarism (with or without ACTH deficiency) associated with spine abnormalities, including frequent rigid cervical spine and short neck with limited rotation, and variable degrees of sensorineural hearing loss. The anterior pituitary gland is usually abnormal (typically hypoplastic) and rarely a mild developmental delay or intellectual disability may be associated.