US seems to be more effective than a clinical exam. True remission in RA must be defined. Moreover, the inclusion of this technique in the new definition of remission is being validated.

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Introduction: Paget bone disease (PBD) is characterized by a disorder in the bone remodeling activity at sites of involvement. This can produce dramatic alterations of local bone architecture and causes most of the complications. We aimed to focus on the characteristics of complications of PDB among hospitalized patients. Material and Methods: A retrospective study was conducted, on PBD patients hospitalized in two rheumatology centers from 1994 to 2019. Characteristics of the PBD complications were studied. Results: Sixty-nine patients were collected with a sex ratio of 0.76 and a mean age of 75.4±6.4 years [43-101]. The diagnosis of PBD was established in the average age of 64.2±11.5 years. The primary reason for consultation was pain (78.3%). The PBD was localized in the pelvis (58%), lower limb (42%), spine (36.2%), skull (23.2%) and upper limb (5.8%). It was polyostotic in 44.9% of cases. Dosage of ALP was 324 [68-8390]. The PDB complication rate was 52.2% and it decreased over time. The main complication was osteoarthritis (23.2%), followed by deafness (17.4%), fracture (15.9%), hydrocephalus (7.2%), neurological disease (7.2%) and osteosarcoma (1.4%). The presence of complications was significantly associated with the polyostotic form (p=0.01), the skull localization (p=0.04), an increased ALP (p=0.02). Conclusion: According to our study, the incidence rate of PBD among hospitalized cases is higher among elderly women and decreases over time. Complications related to PDB are frequent (52%). It concerns patients with a polyostotic form, skull localization and high ALP.

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