title: Unilateral RLS with predominantly ipsilateral PLMS and variable response to dopaminergic drugs: a variant of idiopathic RLS?
abstract: BACKGROUND
  Restless legs syndrome (RLS) is characterized by sensorimotor symptoms that usually are localized in both legs, but may present considerable asymmetry. Patients with strictly and persisting unilateral manifestations have not yet been reported.
  
  
  METHODS
  We describe the clinical and electrophysiological characteristics of three RLS patients with unilateral symptoms.
  
  
  RESULTS
  All essential RLS criteria were fulfilled in each patient. Neuroimaging and electrophysiological studies did not reveal structural lesions. All patients showed a predominance of periodic limb movements in sleep (PLMS) ipsilaterally to the RLS symptoms. Treatment response to dopaminergic drugs was favourable only in one patient.
  
  
  METHODS
  Our observations suggest the existence of unilateral RLS with predominantly ipsilateral PLMS as a (so-far unrecognized) variant of RLS.
authors.affiliation: Department of Neurology, University Hospital of Zurich, Zurich, Switzerland.
authors.forename: P O
authors.initials: PO
authors.lastname: Valko
authors.forename: M M
authors.initials: MM
authors.lastname: Siccoli
authors.forename: C L
authors.initials: CL
authors.lastname: Bassetti
mesh_terms: D000368:Aged; D015259:Dopamine Agents / Q000627:therapeutic use*; D004576:Electromyography; D007839:Functional Laterality; D006801:Humans; D007211:Indoles / Q000627:therapeutic use; D007980:Levodopa / Q000627:therapeutic use; D008279:Magnetic Resonance Imaging; D008297:Male; D008875:Middle Aged; D018482:Muscle, Skeletal / Q000503:physiopathology; D020189:Nocturnal Myoclonus Syndrome / Q000150:complications*; D017286:Polysomnography; D012148:Restless Legs Syndrome / Q000150:complications / Q000188:drug therapy* / Q000503:physiopathology*; D013116:Spinal Cord / Q000473:pathology; D016896:Treatment Outcome; D055815:Young Adult
chemical_list: D015259:Dopamine Agents; D007211:Indoles; C046649:ropinirole; D007980:Levodopa