Hereditary neuropathy or pain disorder
Gene: MMACHC
Gene rated Amber : From feedback from Genomics England Clinical team (Anna de Burca and Meriel McEntagart). Extension of panel scope - syndrome with non-neurological features / Broader phenotype - methylmalonic acidemia & homcysteinuriaCreated: 6 Dec 2019, 9:02 p.m. | Last Modified: 6 Dec 2019, 9:02 p.m.
Panel Version: 0.78
Comment on list classification: This gene has changed ratings because the panel for R78 was going to be a broad panel (to include conditions where neuropathy is part of a more complex phenotype or where there is overlap with another neurological presentation eg. HSP) but subsequently during the follow up call on 21st June with the Test Group it was agreed that it was more clinically relevant for R78 to be restricted to genes that are associated with isolated neuropathy, which this panel represents. For genes that represent the broader phenotype see https://panelapp.genomicsengland.co.uk/panels/85/.Created: 6 Dec 2019, 9:01 p.m. | Last Modified: 6 Dec 2019, 9:01 p.m.
Panel Version: 0.78
Review and rating uploaded from file (Curation_Template_GMS_Neuro_AR_20190521.xlsx) submitted by Alex Rossor (UCL Institute of Neurology) on behalf of London North GLH for GMS Neurology specialist test group.Created: 11 Jun 2019, 1:40 p.m.
should be included in R78 panel as panel now includes complex phenotypes e.g. ACOX1, HEXA, HEXB, MCM3AP, MORC2, PIGB, POLR3B, SLC25A46Created: 17 Mar 2024, 9:15 p.m. | Last Modified: 17 Mar 2024, 9:15 p.m.
Panel Version: 3.83
Mode of inheritance
BIALLELIC, autosomal or pseudoautosomal
Phenotypes
Onset infancy to adulthood; thrombotic thrombocytopenia with encephalopathy, myelopathy, renal and pulmonary complications (can be life threatening), retinitis pigmentosa, axonal motor neuropathy. Treated with high dose vitamin B12.
Publications
Gene: mmachc has been classified as Amber List (Moderate Evidence).
gene: MMACHC was added gene: MMACHC was added to Hereditary neuropathy NOT PMP22 copy number. Sources: NHS GMS,London North GLH Mode of inheritance for gene: MMACHC was set to BIALLELIC, autosomal or pseudoautosomal Publications for gene: MMACHC were set to 20610126 Phenotypes for gene: MMACHC were set to Onset infancy to adulthood; Methylmalonic aciduria and homocystinuria, cblC type, 277400; thrombotic thrombocytopenia with encephalopathy, myelopathy, renal and pulmonary complications (can be life threatening), retinitis pigmentosa, axonal motor neuropathy. Treated with high dose vitamin B12