| 单词 | Down Syndrome,Partial Trisomy 21 |
| 释义 | Down Syndrome,Partial Trisomy 21《英文msh词典》Down Syndrome,Partial Trisomy 21 [入口词] Down Syndrome,Partial Trisomy 21 [主题词] Down Syndrome [英文释义] A chromosome disorder associated either with an extra chromosome 21 or an effective trisomy for chromosome 21. Clinical manifestations include hypotonia,short stature,brachycephaly,upslanting palpebral fissures,epicanthus,Brushfield spots on the iris,protruding tongue,small ears,short,broad hands,fifth finger clinodactyly,Simian crease,and moderate to severe MENTAL RETARDATION. Cardiac and gastrointestinal malformations,a marked increase in the incidence of LEUKEMIA,and the early onset of ALZHEIMER DISEASE are also associated with this condition. Pathologic features include the development of NEUROFIBRILLARY TANGLES in neurons and the deposition of AMYLOID BETA-PROTEIN,similar to the pathology of ALZHEIMER DISEASE. (Menkes,Textbook of Child Neurology,5th ed,p213) |
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