Objective. To investigate whether women with systemic sclerosis (SSc) have an increased risk of osteoporosis (OP) and related fractures compared to a high-risk population with rheumatoid arthritis (RA) and also healthy controls, and to determine putative specific OP and fracture risk factors. Methods. We performed a cross-sectional study with successive inclusion of age-matched healthy women and women with SSc and RA. Risk factors for OP and fracture were collected for all patients. Bone mineral density (BMD) was systematically measured at the lumbar spine and total hip region with dual x-ray absorptiometry.
Our results indicate for the first time that successful PTX in normocalcemic PHPT patients with osteoporosis is followed with mild but significant BMD improvement at the spine and hip at 1 year, comparable with that observed in hypercalcemic PHPT, suggesting that PTX may be beneficial in normocalcemic PHPT.
Our results support the development of a combined approach using both TBS and aBMD for the assessment of bone microarchitecture in inflammatory rheumatic diseases. Our study showed that SSc-related bone involvement is characterized by an impairment in bone quality in addition to reduced bone quantity, and highlights that TBS can identify the negative effect of GC on bone microarchitecture.
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