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sequence (se´kwәns) a connected series of events or things. in dysmorphology, a pattern of multiple anomalies derived from a single known or presumed prior anomaly or mechanical factor. Called also anomalad and complex. the order of arrangement of residues or constituents in a biological polymer, as the order of nucleotides in DNA or RNA, or of amino acids in a protein. a specific fragment or segment of a biological polymer, with a known arrangement of its residues. to ascertain the order of the residues of a biological polymer. oligohydramnios sequence
a group of anomalies, usually causing death shortly after birth, caused by compression of the fetus secondary to oligohydramnios, which may result from agenesis of the kidneys or other fetal urinary tract defects or from leakage of amniotic fluid. Infants
have characteristic flattened facies (Potter facies) and skeletal abnormalities such as clubbed feet and contracted joints, often with underdevelopment of the lungs. Called
also Potter syndrome.
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