Nemaline Myopathy 2; Nem2

Description

Nemaline myopathy-2 is an autosomal recessive skeletal muscle disorder with a wide range of severity. The most common clinical presentation is early-onset (in infancy or childhood) muscle weakness predominantly affecting proximal limb muscles. Muscle biopsy shows accumulation of Z-disc and thin filament proteins into aggregates named 'nemaline bodies' or 'nemaline rods,' usually accompanied by disorganization of the muscle Z discs. The clinical and histologic spectrum of entities caused by variants in the NEB gene is a continuum, ranging in severity from the severe form with perinatal onset and fetal death to milder forms with later onset. The distribution of weakness can vary from generalized muscle weakness, more pronounced in proximal limb muscles, to distal-only involvement, although neck flexor weakness appears to be rather consistent. Histologic patterns range from a severe usually nondystrophic disturbance of the myofibrillar pattern to an almost normal pattern, with or without nemaline bodies, sometimes combined with cores (summary by Lehtokari et al., 2014).For a discussion of genetic heterogeneity of nemaline myopathy, see NEM3 (OMIM ).Mutations in the NEB gene are the most common cause of nemaline myopathy (Lehtokari et al., 2006).

Clinical Features

Top most frequent phenotypes and symptoms related to Nemaline Myopathy 2; Nem2

  • Generalized hypotonia
  • Scoliosis
  • Hypertelorism
  • Muscle weakness
  • Cleft palate
  • Cryptorchidism
  • Low-set ears
  • Flexion contracture
  • High palate
  • Feeding difficulties

And another 62 symptoms. If you need more information about this disease we can help you.

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Incidence and onset information

Not enough data available about incidence and published cases.
No data available about the known clinical features onset.

Researches and researchers

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Nemaline Myopathy 2; Nem2 Recommended genes panels

Panel Name, Specifity and genes Tested/covered
GeneAware Complete Panel Version 2 (Female).

By Baylor Miraca Genetics Laboratories (United States).

RMRP, BCS1L, SACS, BLM, SGCA, SGCB, SGCG, SGSH, SLC12A6, SLC17A5, SLC22A5, SLC25A13, SLC25A15, SLC26A2, SLC35A3, SLC7A7, SMN1, SMPD1, BTD, BTK , (...)

View the complete list with 139 more genes
Specificity
1 %
Genes
100 %
GeneAware Complete Panel Version 2 (Male).

By Baylor Miraca Genetics Laboratories (United States).

RMRP, BCS1L, SACS, BLM, SGCA, SGCB, SGCG, SGSH, SLC12A6, SLC17A5, SLC22A5, SLC25A13, SLC25A15, SLC26A2, SLC35A3, SLC7A7, SMN1, SMPD1, BTD, TGM1 , (...)

View the complete list with 129 more genes
Specificity
1 %
Genes
100 %
GeneAware Ashkenazi Jewish Panel Version 2 (Female).

By Baylor Miraca Genetics Laboratories (United States).

BLM, SLC35A3, SMN1, SMPD1, CLRN1, MCOLN1, PCDH15, RTEL1, CFTR, SUMF1, DHDDS, ADAMTS2, COL4A3, CPT2, TMEM216, DHCR7, DLD, DMD, FAH, FANCC , (...)

View the complete list with 19 more genes
Specificity
3 %
Genes
100 %
GeneAware Ashkenazi Jewish Panel Version 2 (Male).

By Baylor Miraca Genetics Laboratories (United States).

BLM, SLC35A3, SMN1, SMPD1, CLRN1, MCOLN1, PCDH15, RTEL1, CFTR, SUMF1, DHDDS, ADAMTS2, COL4A3, CPT2, TMEM216, DHCR7, DLD, FAH, FANCC, FKTN , (...)

View the complete list with 17 more genes
Specificity
3 %
Genes
100 %
Distal Myopathy Advanced Sequencing Evaluation.

By Athena Diagnostics Inc (United States).

TIA1, MYOT, TTN, VCP, CAV3, LDB3, KLHL9, GNE, CRYAB, ANO5, DES, DNM2, DYSF, FLNC, MATR3, MYH7, NEB
Specificity
6 %
Genes
100 %
Congenital Myopathy Advanced Sequencing Evaluation.

By Athena Diagnostics Inc (United States).

RYR1, BIN1, TNNT1, TPM2, TPM3, TTN, ACTA1, CCDC78, SELENON, TRIM32, CFL2, CNTN1, MEGF10, DNM2, KLHL40, KBTBD13, MTM1, MYBPC3, MYH2, MYH7 , (...)

View the complete list with 1 more genes
Specificity
5 %
Genes
100 %
Neuromuscular Disorders Panel.

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

RYR1, BIN1, SCN4A, SGCA, SGCB, SGCD, SGCE, SGCG, SLC25A4, SUCLA2, SUCLG1, TWNK, TCAP, TIA1, TK2, TNNI2, TNNT1, TPM2, TPM3, MYOT , (...)

View the complete list with 124 more genes
Specificity
1 %
Genes
100 %
Congenital Contractures Panel.

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

SKI, SLC18A3, TNNI2, TNNT3, TPM2, TPM3, UBA1, ZMPSTE24, ACTA1, ADGRG6, SLC5A7, KLHL41, FKBP10, NEK9, NALCN, CHAT, CHRNA1, CHRNB1, CHRND, CHRNE , (...)

View the complete list with 37 more genes
Specificity
2 %
Genes
100 %

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Sources and references

You can check the following sources for additional information.

OMIM MESH Rare Disease Symptoms Checker

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