MedGen

Autosomal dominant deafness-78 (DFNA78) is characterized by profound congenital bilateral sensorineural hearing loss affecting all frequencies. Some patients may have mild motor delay early in life due to vestibular dysfunction, although the motor skills catch up with age. Affected individuals do not have systemic or other neurologic manifestations (summary by Mutai et al., 2020). [from OMIM]

Kilquist syndrome (KILQS) is an autosomal recessive multisystem disorder characterized by neurologic, gastrointestinal, and secretory dysfunction. Affected individuals present at birth with hypotonia, feeding difficulties, mild dysmorphic features, and sensorineural hearing loss. They show poor overall growth associated with gastrointestinal anomalies such as gastroesophageal reflux or midgut malrotation, as well as profound global developmental delay with inability to sit or speak. Tear, sweat, and saliva production is also impaired, causing dry mouth and recurrent bronchial mucus plugging. Some of the clinical features are reminiscent of cystic fibrosis (CF; 219700) (summary by Stodberg et al., 2020). [from OMIM]

Delpire-McNeill syndrome (DELMNES) is a neurodevelopmental disorder with highly variable manifestations. Patients present in infancy with global developmental delay, including motor, speech, and impaired intellectual development. The most severely affected patients have hypotonia, inability to hold their head or walk, bilateral sensorineural deafness, and absent language, whereas others have delayed walking and mild to moderate intellectual disability, often with speech delay and autistic features. More variable features may include spasticity or minor involvement of other organ systems, such as hip dislocation or ventricular septal defect (summary by McNeill et al., 2020). [from OMIM]