Charcot-marie-tooth Disease Type 4b2

Description

Charcot-Marie-Tooth disease type 4B2 (CMT4B2) is a subtype of Charcot-Marie-Tooth type 4 characterized by a severe, early childhood-onset of demyelinating sensorimotor neuropathy, early-onset glaucoma, focally folded myelin sheaths in the peripheral nerves, severely reduced nerve conduction velocities, and the typical CMT phenotype (i.e. distal muscle weakness and atrophy, sensory loss, and frequent pes cavus). Severe visual impairment leading to visual loss has also been reported.

Clinical Features

Top most frequent phenotypes and symptoms related to Charcot-marie-tooth Disease Type 4b2

  • Hearing impairment
  • Sensorineural hearing impairment
  • Muscle weakness
  • Pain
  • Visual impairment
  • Peripheral neuropathy
  • Talipes equinovarus
  • Visual loss
  • Areflexia
  • Hyporeflexia

And another 28 symptoms. If you need more information about this disease we can help you.

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Incidence and onset information

— Currently we don't have prevalence information about this disease (Not enough data available about incidence and published cases.)
No data available about the known clinical features onset.

Alternative names

Charcot-marie-tooth Disease Type 4b2 Is also known as charcot-marie-tooth disease, with focally folded myelin sheaths, autosomal recessive, type 4b2, cmt4b2, charcot-marie-tooth neuropathy, type 4b2.

Researches and researchers

Currently, we don't have any information about doctors, researches or researchers related to this disease. Please contact us if you would like to appear here.


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Charcot-marie-tooth Disease Type 4b2 Recommended genes panels

Panel Name, Specifity and genes Tested/covered
CMT Advanced Evaluation - Recessive, Demyelinating.

By Athena Diagnostics Inc (United States).

PRX, GDAP1, FIG4, FGD4, SBF2, SH3TC2, MTMR2, NDRG1
Specificity
13 %
Genes
50 %
SBF2 DNA Sequencing Test.

By Athena Diagnostics Inc (United States).

SBF2
Specificity
100 %
Genes
50 %
CMT Advanced Evaluation - Comprehensive.

By Athena Diagnostics Inc (United States).

YARS, PRX, GDAP1, LITAF, FIG4, MFN2, TRPV4, FGD4, SBF2, SH3TC2, DNM2, HSPB8, EGR2, GARS, GJB1, HSPB1, LMNA, MPZ, MTMR2, NDRG1 , (...)

View the complete list with 3 more genes
Specificity
5 %
Genes
50 %
CMT Advanced Evaluation - Demyelinating.

By Athena Diagnostics Inc (United States).

YARS, PRX, GDAP1, LITAF, FIG4, FGD4, SBF2, SH3TC2, DNM2, EGR2, GJB1, MPZ, MTMR2, NDRG1, PMP22
Specificity
7 %
Genes
50 %
CMT Advanced Evaluation - Recessive.

By Athena Diagnostics Inc (United States).

PRX, GDAP1, FIG4, FGD4, SBF2, SH3TC2, LMNA, MTMR2, NDRG1
Specificity
12 %
Genes
50 %
CMT Advanced Evaluation - Nonprevalent.

By Athena Diagnostics Inc (United States).

YARS, PRX, GDAP1, LITAF, FIG4, TRPV4, FGD4, SBF2, SH3TC2, DNM2, HSPB8, EGR2, GARS, GJB1, HSPB1, LMNA, MTMR2, NDRG1, NEFL, PMP22 , (...)

View the complete list with 1 more genes
Specificity
5 %
Genes
50 %
CMT Advanced Evaluation - Nonprevalent Demyelinating.

By Athena Diagnostics Inc (United States).

YARS, PRX, GDAP1, LITAF, FIG4, FGD4, SBF2, SH3TC2, DNM2, EGR2, GJB1, MTMR2, NDRG1, PMP22
Specificity
8 %
Genes
50 %
Charcot-Marie-Tooth Hereditary Neuropathy Panel.

By Greenwood Genetic Center Diagnostic Laboratories Greenwood Genetic Center (United States).

SBF1, SLC12A6, SPG11, SURF1, TFG, VCP, YARS, PRX, BSCL2, GDAP1, TRIM2, KIF1B, LITAF, FIG4, MFN2, TRPV4, FGD4, AARS, GNB4, SBF2 , (...)

View the complete list with 34 more genes
Specificity
2 %
Genes
50 %

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Sources and references

You can check the following sources for additional information.

OMIM ORPHANET MESH Genetic Syndrome Finder

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