"Numerical Chromosomal AbnormalityPTNCI" . . "C1518472"^^ . "Numerical_Chromosome_Aberration"^^ . "The chromosomal constitution of cells which deviate from the normal by the addition or subtraction of chromosomes or chromosome pairs. In a normally diploid cell the loss of a chromosome pair is termed nullisomy (symbol: 2N-2), the loss of a single chromosome is monosomy (symbol: 2N-1), the addition of a chromosome pair is tetrasomy (symbol: 2N+2), the addition of a single chromosome is trisomy (symbol: 2N+1).MSH2003_2003_05_12" . "Numerical Chromosome AnomalySYNCI" . "Cell or Molecular Dysfunction"^^ . "chromosomal constitution of cells which deviate from the normal by the addition or subtraction of chromosomes or chromosome pairs.CSP2003" . "C6825"^^ . "Numerical Chromosomal Abnormality"^^ . "Numerical Chromosome AnomaliesSYNCI" . . "Numerical Chromosome AberrationSYNCI" . "Numerical Chromosomal Abnormality"^^ . "Numerical Chromosomal AbnormalitiesSYNCI" . "An irregularity in the number of chromosomes.NCI" .