Gene/Protein Disease Symptom Drug Enzyme Compound
Pivot Concepts:   Target Concepts:
Query: UMLS:C0026827 (hypotonia)
 5,860 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

In this contribution the current status and recent findings of the behavioural phenotype in VCFS (22q11 deletion) are discussed with regard to motor development, cognition and neurodevelopment, and behaviour and temperament. Motor: hypotonia in infancy, gross-motor milestones are delayed, problems with coordination and balance from preschool age on, problems with tempo/speed during adolescence. Cognition and neurodevelopment: learning disabilities (82-100%), intellectual disability (45%), better verbal abilities than performal abilities, poor attention and concentration, visuo-perceptual-spatia problems, good (auditory) memory. An important subgroup of children (55%) has a non-verbal learning disability (NLD). Behaviour and social-emotional development AD(H)D, withdrawn and shy, person-dependent social problems in relationships with peers, anxious, risk for child psychiatric problems as well as for the development of psychiatric problems during adolescence and early adulthood. Information on the behavioural phenotype in VCFS (22q11 deletion) is of great importance to clinicians as an aid to syndrome diagnosis, but even more to parents because it offers immense direct practical value to the management of the behaviour of their child. Appropriate counseling and information on the long-term expectations, and better insight in the behaviour will lead to the development of realistic ways of coping with their child.
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PMID:The behavioural phenotype in velo-cardio-facial syndrome (VCFS): from infancy to adolescence. 1019 33

Velo-cardio-facial syndrome is the most common contiguous gene disorder in humans and constitutes 8% of patients with clefts of the secondary palate. Speech disorders, including severe hypernasality and articulation impairment have been documented as among the most common clinical manifestations of the disorder. A series of 36 consecutive patients with VCFS ranging in age from 3 to 14 years, all confirmed to have a 22q11.2 deletion, were studied to determine specific risk factors associated with VPI and articulation impairment. Factors studied included palatal clefting, hypotonia, platybasia, and adenoid size. The factor that correlated most strongly with speech disorders was adenoid hypoplasia or absence, a common manifestation in the syndrome. It is hypothesized that early identification of the absence or hypoplasia of the adenoids can result in the implementation of appropriate therapy plans to avoid severe disorders of speech intelligibility.
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PMID:Velopharyngeal insufficiency and articulation impairment in velo-cardio-facial syndrome: the influence of adenoids on phonemic development. 1096 79

Ring chromosome 22, a rare cytogenetic finding, was first described in 1968, and since then about 60 patients have been reported. We describe a new patient with ring chromosome 22 syndrome and discuss the common features of the previously reported cases. Our patient had the major features of this syndrome including mental retardation, hypotonia, motor delay, microcephaly, dysplastic large ears, lack of speech, and hyperactivity disorder. Magnetic resonance imaging findings also revealed an arachnoid cyst, found in the posterior cerebellum. In patients with ring chromosome 22, variable clinical manifestations may be seen due to the size of lost sequences near the telomere. By fluorescent in situ hybridization (FISH) technique, LSI DiGeorge/VCFS/ ARSA locus-specific probes are used to detect deleted sequences. We found that 22q11.2 regions were intact on both chromosomes 22, but 22q13.3 (Arylsulfatase A; ARSA region) was absent in the ring chromosome. As far as we know this is the first reported Turkish patient in the literature.
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PMID:A case with a ring chromosome 22. 1866 89