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Objective: The diagnosis restless legs syndrome (RLS) in children depends on the history told by the child and his parents. The description of symptoms given by the child himor herself is most important. Additional criteria are, among others, the results of polysomnography (PSG). Description of the presenting symptoms is the aim of the study., Methods: Survey in two European pediatric sleep centers of presenting symptoms in children who after a detailed work-up proved to have RLS., Results: Fifty-two percent of the 31 children presented with symptoms similar to those mentioned in the "four questions" relevant for the diagnosis of RLS. In the other patients the description included often very colourful wordings, such as "ants or spiders in the legs, legs want to kick, need to stretch." All children were tired or sleepy during daytime and nearly all reported an urge to move. Insomnia was mentioned by 61% of the patients. The presenting symptoms did not differ significantly from those mentioned in a previous study in the US, but did so when compared to adults with RLS. PSG revealed an abnormal periodic limb movement index in 81% of the children., Conclusions: The description of presenting symptoms in children with the final diagnosis of RLS differs from that in adults. The results of this European study corroborate those from the US.

Recent evidence has been accumulating that the sleep of individuals with attention deficit hyperactivity disorder (ADHD) is not only disrupted in a nonspecific way but that ADHD has an increased association with simple sleep related movement disorders such as restless legs syndrome/periodic limb movements in sleep (RLS/PLMS), rhythmic movement disorder (body rocking and head banging), and parasomnias, such as disorders of partial arousal (sleep walking, sleep terrors, and confusional arousals). In addition increased associations have been reported between ADHD and hypersomnias such as narcolepsy and sleep apnea as well as circadian rhythm disorders, such as delayed sleep phase syndrome. These relationships are reviewed and the implications for such associations are explored. Patients with sleep disorders should be queried about the symptoms of ADHD and vice versa.