Duplication-deletion with partial trisomy lq and partial monosomy 3p resulting from a maternal reciprocal translocation rcp (1;3) (q32;p25).

A mother with a translocation rcp (1;3) (q32;p25) gave birth to a son with duplication of 1q32 leads to qter and deletion of 3p25 leads to pter. At 17 1/2 years of age, the proband was severely mentally retarded and presented a pattern of multiple minor dysmorphic stigmata and anomalies, including hypertrichosis, synophrys, ocular hypertelorism, ptosis, convergent squint, cleft uvula nad narrow palate, poorly modelled auricles, funnel chest, kyphoscoliosis, umbilical and inguinal hernias, and cubitus valgus. He had normal stature and did not have any apparent malformations

A translocation breakpoint disrupts the ASPM gene in a patient with primary microcephaly.

Primary microcephaly (microcephalia vera) is a developmental abnormality resulting in a small brain, with mental retardation. It is usually transmitted as an autosomal recessive trait, and six loci have been reported to date. We analyzed a translocation breakpoint previously reported in a patient with apparently sporadic primary microcephaly, at 1q31, where locus MCPH5 maps. The patient was lost to follow-up, and we sampled a maternal aunt who carried the familial translocation. FISH analyses showed that the insert of BAC clone RP11-32D17 spanned the breakpoint. The breakpoint was further located within a fragment of this insert corresponding to intron 17 of the ASPM gene, resulting in a predicted transcript truncated of more than half of its coding sequence. It is very likely that the proband carried a second ASPM mutation in trans, but he was not available for sampling and hence we could not confirm this hypothesis. Our observation adds to the mutation spectrum of ASPM in primary microcephaly, and is to our knowledge the second example of a constitutional, reciprocal translocation responsible for a bona fide autosomal recessive phenotype.Case ReportsJournal ArticleResearch Support, Non-U.S. Gov'tSCOPUS: ar.jinfo:eu-repo/semantics/publishe