Moeinadin Safavi 
1*, Mohammad Taghi Haghi Ashtiani 
1, Reza Shervin Badv 
2, Aileen Azari-Yam 
1, Mohammad Vasei 
1*1 Molecular Pathology and Cytogenetics Division, Pathology Department, Children’s Medical Center, Tehran University of Medical Sciences, Tehran, Iran
2 Pediatric Neurology Department, Children’s Medical Center, Tehran University of Medical Sciences, Tehran, Iran
        
 
        
	
        
        
Abstract
            Monosomy 18p syndrome is one of the prototypical examples of autosomal terminal deletions. This deletion can be the  consequence of de novo deletions, malsegregation of a balanced parental translocation, cryptic subtelomeric deletions or ring  chromosome 18. The present case is a rare cytogenetic variant of monosomy 18 as a consequence of whole-arm translocation  between chromosomes 13 and 18 which has been reported only three times previously.