Abstract:
Fibromyalgia (FM) is a very frequent condition in patients with diseases associated with pain syndrome, such as rheumatoid arthritis (RA), ankylosing spondylitis (AS) and other chronic rheumatic diseases. FM, RA and AS has
different clinical characteristics, but can share symptoms such as pain, fatigue
and sleep disturbance that leads to delay in appropriation correct diagnosis [1].
For today well known many different criteria for FM: 1990 American College of
Rheumatology (ACR) classification criteria, modified 2010 ACR diagnostic criteria, 2016 Fibromyalgia Diagnostic Criteria and new AAPT Diagnostic Criteria for Fibromyalgia. According to the literature, prevalence FM in AS patients can reach
from 12.6 to 28.5%, but prevalence estimates should be interpreted with care as
no data that the criteria for FM have been validated for use in patients with AS
and other chronic inflammatory arthritis [1, 2]. The lack of appropriate information
needs further investigation for better identification FM.
