Arm Involvement in Restless Legs Syndrome
Prevalence and Clinical Pattern
- Approximately 50 % of individuals with restless‑legs syndrome (RLS) experience spread of symptoms from the legs to the arms, although the legs usually remain the most severely affected region. 1
Diagnostic Criteria
- The International Restless Legs Syndrome Study Group (IRLSSG) explicitly incorporates possible arm (or other body‑part) involvement into its diagnostic criteria, recognizing it as an extension of the same disease rather than a separate disorder. 1
Treatment Recommendations
First‑Line Pharmacotherapy
- Gabapentinoids (gabapentin, gabapentin enacarbil, pregabalin) are given a strong recommendation as first‑line therapy for adults with RLS, irrespective of whether symptoms are limited to the legs or have spread to the arms. 6
Iron Repletion
- Intravenous ferric carboxymaltose receives a strong recommendation for patients with documented iron deficiency (e.g., ferritin ≤ 100 ng/mL or transferrin saturation < 20 %). 6
Dopamine Agonists
- Dopamine agonists (pramipexole, ropinirole, rotigotine) carry a conditional recommendation against routine use because of a 7–10 % annual risk of augmentation, which often manifests as symptom spread to the arms. 8
Clinical Pitfalls
- Arm symptoms should not be interpreted as a separate diagnosis; they are part of the RLS spectrum according to the IRLSSG criteria. 1