Tehran University of Medical Sciences Acta Medica Iranica 0044-6025 36 1 1998 06 15 64 69 M. T. Akbari. F. Behjati. Ashtiani M. Khaleghian 2015 09 28 This report presents the cytogenetic findings (G -banded chromosomal analysis} in 383 cases referred for suspected chromosomal abnormalities because of abnormal clinical features. Chromosomal aberrations were found in 63 116.5%) of these cases, free trisomy 21 (7%) being the most common abnormality , followed by 47, XXYkaryotype (4%). The breakdown figures for each group is discussed in the text. https://acta.tums.ac.ir/index.php/acta/article/view/1744 https://acta.tums.ac.ir/index.php/acta/article/download/1744/1737