Presentation
Female carriers are usually asymptomatic but they may present with muscular weakness because of a hypothesized skewed pattern of X-chromosome inactivation.By combining next generation sequencing (NGS) and CGH array approaches, we have investigated the [moh-it.pure.elsevier.com]
Patients present with severe form of congenital myopathy and abnormal male genitalia. [orpha.net]
In female patients, this presents as missing or single ovaries, much harder by nature to detect. Ultrasound imaging is performed at regular intervals, from the age of 1 year, to determine if ovaries are present. [en.wikipedia.org]
In general, the earlier the symptoms present, the more severe and progressive is the disorder. X-linked MTM This is the most severe and most studied form, which presents at birth or even prior to birth, typically occurring in males. [encyclopedia.com]
Entire Body System
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Fatigue
These include criteria for the diagnosis of multiple sclerosis, dementia of Lewy-body type, frontal lobe dementias, chronic fatigue syndrome, and inflammatory neuropathies. [books.google.com]
[…] growth defects, reduced cell proliferation, abnormal life span, tumor prolapse frequency decreased Autoimmune polyglandular syndromeendocrine glandAIRE T cell activation, proliferation and differentiation defect, muscle pain and cramping, weakness and fatigue [nemametrix.com]
Care should be taken not to overexert and fatigue the already weak muscles and a regular exercise program should be devised. Passive stretching, bracing, and surgical-release procedures are done to prevent tendon and joint contractures. [encyclopedia.com]
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Asymptomatic
Female carriers are usually asymptomatic but they may present with muscular weakness because of a hypothesized skewed pattern of X-chromosome inactivation.By combining next generation sequencing (NGS) and CGH array approaches, we have investigated the [moh-it.pure.elsevier.com]
Finkel RS...Darras BT 2017 10 A natural history study of X-linked myotubular myopathy. ( 28842446 ) Amburgey K...Dowling JJ 2017 11 Grand paternal inheritance of X-linked myotubular myopathy due to mosaicism, and identification of necklace fibers in an asymptomatic [malacards.org]
(Reproduced from MedLink Neurology, with permission) The majority of carriers of the X-linked formare asymptomatic but a few may show signs of mild muscle weakness [ 10, 32 – 34 ]. [ojrd.biomedcentral.com]
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Fishing
Using FISH we detected in the mother a hemizygous deletion including the myotubularin gene MTM1 and F18 (a gene of yet unknown function). [karger.com]
Finally, women known to have an abnormal genetic makeup of their own were found to have 62% of their embryos aneuploid when tested by FISH. [medfem.co.za]
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Chronic Fatigue Syndrome
These include criteria for the diagnosis of multiple sclerosis, dementia of Lewy-body type, frontal lobe dementias, chronic fatigue syndrome, and inflammatory neuropathies. [books.google.com]
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Congestive Heart Failure
PubMed Google Scholar Gospe SM, Armstrong DL, Gresik MV, Hawkins HK: Life-threatening congestive heart failure as the presentation of centronuclear myopathy. Pediatr Neurol. 1987, 3: 117-120. 10.1016/0887-8994(87)90040-3. [ojrd.biomedcentral.com]
Musculoskeletal
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Myopathy
Barth PG, Dubowitz V: X-linked myotubular myopathy – a long-term follow-up study. Eur J Paediatr Neurol 1:49–56 (1998). [karger.com]
AB - Mutations in the MTM1 gene cause X-linked myotubular myopathy (XLMTM), characterized by neonatal hypotonia and respiratory failure, and are responsible for a premature mortality in affected males. [moh-it.pure.elsevier.com]
The members of this group of relatively nonprogressive congenital myopathies are central-core myopathy, nemaline myopathy, the mitochondrial myopathies, myotubular myopathy, and other even rarer types (reducing body, fingerprint, zebra body, sarcotubular [healthcentral.com]
myopathy, in a Greek family. ( 22435031 ) Fidani L....Nikolaidis N. 2011 36 Mutation studies in X-linked myotubular myopathy in three Indian families. ( 20358311 ) Bijarnia S....Verma I.C. 2010 37 Prenatal diagnosis of X-linked myotubular myopathy. [malacards.org]
[…] related, associated with mutation in the CRYAB gene Myopathy, distal Myopathy, distal with anterior tibial onset Myopathy, distal, Tateyama type Myopathy, early-onset with fatal cardiomyopathy Myopathy, lactic acidosis, and sideroblastic anemia Myopathy [qlinics.com]
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Long Arm
Fitch N, de Saint Victor J, Richer CL, Pinsky L, Sitahal S: Premature menopause due to a small terminal deletion in the long arm of the X chromosome: a report of three cases and a review. Am J Obstet Gynecol 142:968–972 (1982). [karger.com]
Homepage Rare diseases Search Search for a rare disease X-linked myotubular myopathy-abnormal genitalia syndrome Disease definition X-linked myotubular myopathy-abnormal genitalia syndrome is a rare chromosomal anomaly, partial deletion of the long arm [orpha.net]
arms, legs and fingers,Chest sinks in or sticks out, Flexible joints fbn-1 developmental defect, fertility defects, Fluorouracil resistant, locomotion defects, slow growthMyotonic dystrophymusclesDMgradual muscle loss and weakness, muscles contraction [nemametrix.com]
It is due to a mutation in the myotubularin, or MTM1, gene that occurs on the long arm of the X chromosome at locus Xq28. Another related gene, called MTMR1, is also found on the X chromosome. [encyclopedia.com]
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Muscle Hypotonia
hypotonia Ataxia telangiectasia like disorder Ataxia, posterior column, with retinitis pigmentosa Ataxia, progressive seizures, mental deterioration, and hearing loss, MT-TV related Ataxia-oculomotor apraxia Ataxia-telangiectasia Attention deficit-hyperactivity [qlinics.com]
Psychiatrical
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Suggestibility
Novel findings associated with MTM1 suggest a higher number of female symptomatic carriers. Neuromuscular Disorders, 26 (4-5), 292-299. [moh-it.pure.elsevier.com]
Our results suggest that denaturing high-performance liquid chromatography provides an accurate method for the rapid identification of MTM1 mutations [29]. [wikigenes.org]
Regional studies in Northern Ireland [ 4 ] and Western Sweden [ 5 ], suggest a prevalence of 3.5 – 5.0/100,000 in a paediatric population. [ojrd.biomedcentral.com]
Treatment [ edit ] It is suggested that, once diagnosed, individuals be routinely followed by a cardiologist, endocrinologist, dermatologist, and other appropriate specialties as symptoms present. [en.wikipedia.org]
Obstructive cardiomyopathy and other pathologic findings involving the cardiovascular system may be a cause of death in those whose cardiac deformities are profound. [ 13 ] Treatment It is suggested that, once diagnosed, individuals be routinely followed [en.academic.ru]
Onset
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Neonate-Onset
onset of the disease in male infants is sufficient to address the direct molecular testing toward the MTM1 gene and, above all, suggest that the number of undiagnosed symptomatic female carriers is probably underestimated [moh-it.pure.elsevier.com]
More recently, heterozygous de novo dominant DNM2 mutations affecting the PH domain have also been identified in a more severe CNM phenotype without any early peripheral nerve involvement and characterised by neonatal onset but gradual improvement over [ojrd.biomedcentral.com]
Neurologic
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Peripheral Neuropathy
Entries on cerebellar diseases, peripheral neuropathies, various dementias, diagnostic tests (both clinical and laboratory), forms of cerebral edema, dissociative signs and syndromes - all these and many more have been added, expanded, updated or clarified [books.google.com]
partial, with minifascicular neuropathy Achalasia addisonianism alacrimia syndrome Acrocallosal syndrome Acyl-CoA peroxisomal oxidase deficiency Adrenoleukodystrophy Adrenoleukodystrophy / Adrenomyeloneuropathy Agenesis of the corpus callosum with peripheral [qlinics.com]
neuropathies of the Charcot-Marie-Tooth (CMT) type, CMT 4B1 [ 111, 112 ] and CMT 4B2 [ 113, 114 ]. [ojrd.biomedcentral.com]
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Neonatal Hypotonia
AB - Mutations in the MTM1 gene cause X-linked myotubular myopathy (XLMTM), characterized by neonatal hypotonia and respiratory failure, and are responsible for a premature mortality in affected males. [moh-it.pure.elsevier.com]
Myotubular myopathy ( MTM1 ) is an X-linked disease, characterized by severe neonatal hypotonia and generalized muscle weakness, with pathological features suggesting an impairment in maturation of muscle fibres [2]. [wikigenes.org]
The main differential diagnoses include congenital myotonic dystrophy and other conditions with severe neonatal hypotonia. Management of CNM is mainly supportive, based on a multidisciplinary approach. [ojrd.biomedcentral.com]
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Cerebellar Disease
Entries on cerebellar diseases, peripheral neuropathies, various dementias, diagnostic tests (both clinical and laboratory), forms of cerebral edema, dissociative signs and syndromes - all these and many more have been added, expanded, updated or clarified [books.google.com]
Workup
Other Pathologies
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Hepatic Necrosis
necrosis mhpg3 methoxy 4 hydroxy phenylglycol mhqmiddlesex hospital questionnaire mhrtmental health review tribunal mhssmilitary health services system mhvmiddle hepatic vein mhzmegahertz mimassa intermedia mimaturation index mimental institution mimesial [medabb.com]
Treatment
Dr Jane Hurst is a clinician working full time as a clinical geneticist in the one of the leading children's hospitals in the world; a centre of excellence for the diagnosis and treatment of rare diseases. [books.google.com]
Meanwhile, our professional treatment centers spread all over the world, such as the cancer treatment center in German.Now we are joining hands with a five-star hospital in Thailand to establishthe world’s leading cancer treatment center, and thus our [lifescicenter.com]
Treatment There is no available treatment for these myopathies. However, providing orthosis for correction of skeletal deformities or even surgical correction often leads to improvement of functional disabilities. [healthcentral.com]
CLOSE Medical Disclaimer The medical information on this site is provided as an information resource only, and is not to be used or relied on for any diagnostic or treatment purposes. [diseaseinfosearch.org]
Prognosis
Prognosis Only males are severely affected by X-linked MTM and prognosis has been historically poor due to early respiratory failure. [encyclopedia.com]
In the absence of severe cardiorespiratory involvement, the prognosis appears favourable. [ojrd.biomedcentral.com]
Prognosis The course of myotonic dystrophy varies. When symptoms appear earlier in life, disability tends to become more severe. Occasionally people with DM may require a wheelchair later in life. [medical-dictionary.thefreedictionary.com]
Prognosis [ edit ] In itself, NSML is not a life-threatening diagnosis, most people diagnosed with the condition live normal lives. [en.wikipedia.org]
Prognosis In itself, LEOPARD syndrome is not a life threatening diagnosis, most people diagnosed with the condition live normal lives. [en.academic.ru]
Epidemiology
Noonan syndrome is fairly common (1:1,000 to 1:2,500 live births), and neurofibromatosis 1 (which was once thought to be related to NSML) is also common (1:3500); however, no epidemiological data exists for NSML. [4] Signs and symptoms [ edit ] An alternative [en.wikipedia.org]
Epidemiology Various literature describes it as being "rare" [ 13 ] or "extremely rare". [ 14 ] There is no epidemiologic data available, regarding how many in the world population suffer from the syndrome, however there are slightly over 100 cases described [en.academic.ru]
Epidemiology Epidemiological data are only available for the congenital myopathies as a group but not for specific conditions. [ojrd.biomedcentral.com]
Pathophysiology
Pathophysiology [ edit ] NSML is inherited in an autosomal dominant fashion, although it can also arise due to spontaneous mutation. [en.wikipedia.org]
Pathophysiology LEOPARD syndrome is inherited in an autosomal dominant fashion, although it can also arise due to spontaneous mutation. [en.academic.ru]
Prevention
We focus on disease prevention but not treatment after disease detecting. [lifescicenter.com]
Passive stretching, bracing, and surgical-release procedures are done to prevent tendon and joint contractures. Bracing or surgery may be needed to correct spinal deformities. [encyclopedia.com]
A high-fiber diet can help prevent constipation. Sleep apnea may be treated with surgical procedures to open the airways or with nighttime ventilation. Treatment of sleep apnea may reduce drowsiness. [medical-dictionary.thefreedictionary.com]
PubMed Central PubMed Google Scholar Owen DJ, Wigge P, Vallis Y, Moore JD, Evans PR, McMahon HT: Crystal structure of the amphiphysin-2 SH3 domain and its role in the prevention of dynamin ring formation. [ojrd.biomedcentral.com]