title: Tetrasomy 18p: tentative delineation of a syndrome.
mesh_terms: D000015:Abnormalities, Multiple / Q000235:genetics; D002869:Chromosome Aberrations / Q000235:genetics*; D025063:Chromosome Disorders; D002902:Chromosomes, Human, 16-18; D006801:Humans; D007223:Infant; D008297:Male; D011597:Psychomotor Performance / Q000502:physiology; D013577:Syndrome