Bohring-Opitz syndrome is characterised by intrauterine growth retardation (IUGR), failure to thrive, facial dysmorphism (prominent metopic suture and forehead nevus flammeus, a low frontal and temporal hairline with hirsutism, puffy cheeks, upslanting palpebral fissures, exophthalmos, hypertelorism, cleft lip and palate, retrognathia and low set ears), flexion deformities of the elbows and wrists, camptodactyly, ulnar deviation of the fingers, foot anomalies and severe developmental delay. Less than 20 patients have been described so far. Although the large majority of reported cases occurred sporadically, autosomal recessive inheritance has also been reported.
Seizures are an intermittent abnormality of the central nervous system due to a sudden, excessive, disorderly discharge of cerebral neurons and characterized clinically by some combination of disturbance of sensation, loss of consciousness, impairment of psychic function, or convulsive movements. The term epilepsy is used to describe chronic, recurrent seizures.
Pathogenic ASXL1 somatic variants in reference databases complicate germline variant interpretation for Bohring-Opitz Syndrome.
Carlston CM, O'Donnell-Luria AH, Underhill HR, Cummings BB, Weisburd B, Minikel EV, Birnbaum DP, , Tvrdik T, MacArthur DG, Mao R. Hum Mutat. 2017;38(5):517-523.
Exome sequencing of a 6-year-old female patient with seizures, developmental delay, dysmorphic features, and failure to thrive identified an ASXL1 variant previously reported as causative of Bohring-Opitz syndrome (BOS).
