Marshall-Smith Syndrome, discovered in 1971 (Marshall, Graham, Scott, Boner, & Smith), is characterized by unusual accelerated skeletal maturation (usually starting before birth) and symptoms like conspicuous physical characteristics, respiratory difficulties, and mental retardation. Cases described in the literature show a clinical variability regarding related symptoms. For instance, respiratory difficulties are ranging from absent to severe difficulties.
The syndrome is a rare clinical disorder.
PhysicalOvergrowthAccelerated skeletal maturationDysmorphic facial featuresProminent eyesBluish scleraeCoarse eyebrowsUpturned noseRadiologic examinationAccelerated osseous maturationPhalangeal abnormalitiesTubular thinning of the long bonesSkull abnormalitiesMentalOften associated with mental retardation (of variable degree)The first gene that could cause the syndrome is described recently and is called NF1X (chromosome 19: 19p13.1).
Health and screening
Clinical courseRespiratory difficulties (like upper airway obstruction. (Note regarding clinical variability: respiratory difficulties might be absent.)PneumoniaFailure to thrivePsychomotor retardationRespiratory complications are often cause of death in early infancy.
English: Marshall–Smith syndromeEspañol: Síndrome de Marshall–SmithFrançais: Le syndrome de Marshall–SmithItaliano: Sindrome di Marshall–SmithNederlands: Marshall–Smithsyndroom, syndroom van Marshall–SmithPolski: Zespół Marshalla–Smitha, Zespół Marshalla i SmithaРусский: Синдром Маршалла–СмитаGreig's syndrome or Polysyndactyly cephalopolysyndactyly syndrome [1]Accelerated skeletal maturation, Marshall-Smith type [2]Marshall–Smith–Weaver syndromeMarshall–Smith syndrome is not to be confused with:
Marshall syndrome (aka.Periodic fever, aphthous stomatitis, pharyngitis and adenitis (PFAPA syndrome, see also: Periodic fever syndrome)Sotos (like) syndrome Weaver-Smith syndrome (WSS) [3] (Dutch)Marshall RE, Graham CB, Scott CR, Smith DW (Jan 1971). "Syndrome of accelerated skeletal maturation and relative failure to thrive: a newly recognized clinical growth disorder". J Pediatr. 78 (1): 95–101. doi:10.1016/S0022-3476(71)80269-X. PMID 4321601. After the first discovery and description of Marshall–Smith syndrome in 1971, research to this rare syndrome has been carried out.
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