Ultrasound Evaluation of the Muscular Structural Parameters in Patients with Systemic Lupus Erythematosus
DOI:
https://doi.org/10.53903/01212095.78Keywords:
Ultrasonography, Musculoskeletal system, Lupus erythematosus systemic, MyositisAbstract
Objective: To detect muscle structure alterations related to patients diagnosed with Systemic Lupus Erythematosus (SLE) and to describe their relationship with disease activity and time of treatment. Methods: patients > 18 years with diagnosis of SLE affiliated to Sanitas Health System and treated during the period from January 2016 to September 2018. The demographic, clinical and serological information were obtained from the patient’s medical records, prior to ultrasound examination from the proximal pennate triceps and vastus lateralis muscles. The qualitative and quantitative variables of the muscular architecture were evaluated (muscle thickness, fascicle length, angle of pennation, echogenicity, atrophy and muscular edema). Results: 21 patients were included of which 18 were women (85.7%), 19 of them in the age range of 18-50 years (90.4%), 15 patients reported myalgia in the interview (71%) and 7 presented loss of their strength in the MRC scale (33%). The majority of patients received a steroid-based treatment (95%) plus a disease-modifying medication. Ten patients presented a mild to moderate disease activity index (81.2%). Regarding ultrasound measurements, we found a relationship between a pennation angle of less than 11.4 degrees and the presence of atrophy with a value of p = 0.035. Conclusions: Musculoskeletal ultrasound is a useful non-invasive method for detecting changes in the muscle architecture of the vastus lateralis muscle in patients diagnosed with SLE.
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