Two cases of growth failure, microcephaly, facial dysmorphism, muscular hypertonia, and severe psychomotor retardation are described. At birth, both cases had cytogenetic mosaicism in lymphocytes and skin fibroblasts, in case 1 ring chromosome 21 and monosomy 21 and in case 2, deletion of chromosome 21 and monosomy 21. At a later age the lymphocyte karyotype changed almost completely to 46,XX, ...

monosomy 21 is a rare chromosomal abnormality which is persented in mosaic or homogenous forms.the latter form which is very rare,is determined by intra uterin growth retardation)IUGR),failure to thrive (FTT),prominent craniofacial,skeletal deformities and differnt degrees of delay in psychomotor activities.we report an eight years old boy who was admitted in pediatric ward(hospital No 1 of Ker...

We report a case of a neonate who was shown with routine chromosome analysis on peripheral blood lymphocytes to have full monosomy 21. Further investigation on fibroblast cells using conventional chromosome and FISH analysis revealed two additional mosaic cell lines; one is containing a ring chromosome 21 and the other a double ring chromosome 21. In addition, chromosome microarray analysis (CM...

Background Monosomy is defined as the presence of only one chromosome instead of two in humans. Partial monosomy occurs when only a portion of the chromosome is present in a single copy, while the rest has two copies. It can occur in unbalanced translocations or deletions. Case report In this report, a 6 years old girl was presented who was referred to the Pediatric Dep, Shahid Sadoughi Ho...

BACKGROUND Monosomy is defined as the presence of only one chromosome instead of two in humans. Partial monosomy occurs when only a portion of the chromosome is present in a single copy, while the rest has two copies. It can occur in unbalanced translocations or deletions. CASE REPORT In this report, a 6 years old girl was presented who was referred to the Pediatric Dep, Shahid Sadoughi Hospi...