A mentally retarded boy with a ring E18 chromosome.
D002648:Child; D002902:Chromosomes, Human, 16-18; D004392:Dwarfism / Q000235:genetics*; D006801:Humans; D008607:Intellectual Disability / Q000235:genetics*; D007621:Karyotyping; D008297:Male; D008831:Microcephaly / Q000235:genetics*