Many children who have been maltreated and have trauma are misdiagnosed with ADHD...trauma can cause similiar behaviors: difficulty concentrating, paying attention, problems with focusing, hyperarousal and hyper activity, etc.
In addition sensory integration disorders can be misdiagnosed as ADHD....I'd be sure to get a thorough evaluation by a therapist who is experienced in treating trauma and attachment disorders...see
www.attach.org
regards