الفهرس 
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Abstract
Fibromyalgia (FM) is a clinical syndrome commonly observed in daily medical practice and its aetiopathogenesis is still unclear. It is characterized by chronic musculo¬skeletal pain associated with several symptoms , so that FM may be confused with several other rheumatic and non-rheumatic diseases that have the pictures of diffuse pain and chronic fatigue in their course (Helfenstein et al., 2012). In addition, fibromyalgia coexists in unusually high frequency with certain illnesses characterized by systemic inflammation, such as rheumatoid arthritis (RA) and systemic lupus erythematosus (SLE) (Wolfe et al., 1984, Middleton et al., 1994 and Buskila et al., 2003).
Fibromyalgia was previously diagnosed by ACR 1990 classification criteria (Wolfe et al., 1990). Recently, the ACR set new diagnostic criteria 2010 that are simple to be used in clinical practice (Wolfe et al., 2010).
For assessment of disability in fibromyalgia patients, both Revised Fibromyalgia Impact Questionnaire (FIQR) and Fibromyalgia Impact Questionnaire visual analogue scales (FIQ VASs) can be used, that are simple and easy to score. In addition a modified version Symptom Impact Questionnaire (SIQR) can differentiate between fibromyalgia patients and those having RA or SLE without concomitant FM (Bennett et al., 2009, Boomershine et al., 2011 & Friend and Bennett, 2011).
The aim of the current study was to assess the impact and disability of FM patients were diagnosed by new ACR criteria 2010 using FIQR & FIQ VASs and distinguish FM from RA & SLE using SIQR.
This study was carried out on 80 female patients who were classified into three groups:
Group I: included 24 patients (30%) with 1ry FM.
Group II: included 16 patients (20%) with 2ry FM on top of RA and SLE.
Group III: included 40 RA and SLE patients (50%) without FM.
Patients with known systemic illness, infection, malignancy, chronic fatigue syndrome or other causes that explain the presence of widespread pain such as osteomalacia, myofascial pain syndrome, radiculopathy and steroid tapering were excluded.