• X-linked dominant (XD)
• Mutation in MECP2 gene
• Common in girls
• Severe mental retardation
• Microcephaly after birth
• Normal developmental upto 5 months to 1 year and loss of milestones after that.
• X-linked dominant (XD)
• Mutation in MECP2 gene
• Common in girls
• Severe mental retardation
• Microcephaly after birth
• Normal developmental upto 5 months to 1 year and loss of milestones after that.