| IRD | infantile Refsum syndrome; isorhythmic dissociation |
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| IS | ileal segment; immediate sensitivity; immune serum; immunosuppression; impingement syndrome; incenti... |
| LIAFI | late infantile amaurotic familial idiocy |
| LIMM | lethal infantile mitochondrial myopathy |
| PIP | paralytic infantile paralysis; peak inflation pressure, peak inspiratory pressure; periodic interim ... |
| infantile spastic paraplegia | A spastic paralysis of the lower extremities occurring in the infant. Synonym: infantile spastic paraplegia. (05 Mar 2000) |
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| infantile spinal muscular atrophy | Transmitted as autosomal recessive on chromosome 5q. Progressive dysfunction of the anterior horn cells in the spinal cord and brainstem cranial nerves with profound weakness and bulbar dysfunction occurring in the first two years of life. Three groups, based on age of clinical onset, are recognised. Synonym: familial spinal muscular atrophy, Hoffmann's muscular atrophy, infantile muscular atrophy, infantile progressive spinal muscular atrophy, progressive infantile spinal muscular atrophy, Werdnig-Hoffmann disease, Werdnig-Hoffmann muscular atrophy. (05 Mar 2000) |
| infantile tetany | Tetany of infants occurring usually in rickets, due to dietary deficiency of vitamin D. (05 Mar 2000) |
| early infantile autism | A severe emotional disturbance of childhood characterised by qualitative impairment in reciprocal social interaction and in communication, language, and social development. Synonym: autistic disorder, childhood schizophrenia, early infantile autism, Kanner's syndrome. (05 Mar 2000) |
| endemic nonbacterial infantile gastroenteritis | An endemic viral gastroenteritis of young children (6 months to 12 years) that is especially widespread during winter, caused by strains of rotavirus; the incubation period is 2 to 4 days, with symptoms lasting 3 to 5 days, including abdominal pain, diarrhoea, fever, and vomiting. Synonym: infantile gastroenteritis. (05 Mar 2000) |