Monogenic hearing loss
Gene: MORC2After NHS Genomic Medicine Service consideration, the rating of this gene has not been changed. The decision was too keep an Amber rating for now.Created: 3 Mar 2022, 1:19 p.m. | Last Modified: 3 Mar 2022, 1:19 p.m.
Panel Version: 2.221
Comment on list classification: Though signs suggestive of neuropathy were observed in the cohort presented by Sacoto et al (PMID:32693025), these were not the predominant feature of the disease presentation or the primary indication for diagnostic testing. Furthermore, some cases with hearing loss would not be tested for other panels related to this phenotype (e.g. ID, severe microcephaly) as they did not exhibit the relevant features.
Therefore, this gene should be promoted to Green at the next GMS panel update (added 'for-review' tag).Created: 8 Dec 2020, 4:16 p.m. | Last Modified: 8 Dec 2020, 4:16 p.m.
Panel Version: 2.134
MORC2 variants have commonly been associated with CMT, presenting axonal neuropathy with progressive weakness, muscle cramps and sensory impairment. However, Sacoto et al (2020) (PMID: 32693025) present a cohort of 20 individuals (19 kindreds) with a neurodevelopmental disorder characterised by DD, ID (18/20 - mild to severe), short stature (18/20), microcephaly (15/20) and variable craniofacial dysmorphisms. Hearing loss was observed in 11/19 subjects, primarily SNHL.
Sources: LiteratureCreated: 8 Dec 2020, 4:06 p.m.
Mode of inheritance
MONOALLELIC, autosomal or pseudoautosomal, imprinted status unknown
Phenotypes
Developmental delay; Intellectual disability; Growth retardation; Microcephaly; Craniofacial dysmorphism; Charcot-Marie-Tooth disease, axonal, type 2Z, OMIM:616688
Publications
Tag for-review was removed from gene: MORC2.
Gene: morc2 has been classified as Amber List (Moderate Evidence).
Phenotypes for gene: MORC2 were changed from Developmental delay; Intellectual disability; Growth retardation; Microcephaly; Craniofacial dysmorphism; Charcot-Marie-Tooth disease, axonal, type 2Z, OMIM:616688 to Sensorineural hearing loss; Developmental delay; Intellectual disability; Growth retardation; Microcephaly; Craniofacial dysmorphism; Charcot-Marie-Tooth disease, axonal, type 2Z, OMIM:616688
gene: MORC2 was added gene: MORC2 was added to Hearing loss. Sources: Literature for-review tags were added to gene: MORC2. Mode of inheritance for gene: MORC2 was set to MONOALLELIC, autosomal or pseudoautosomal, imprinted status unknown Publications for gene: MORC2 were set to 32693025 Phenotypes for gene: MORC2 were set to Developmental delay; Intellectual disability; Growth retardation; Microcephaly; Craniofacial dysmorphism; Charcot-Marie-Tooth disease, axonal, type 2Z, OMIM:616688 Review for gene: MORC2 was set to GREEN