Rare Cases of Polymyalgia Rheumatica After Receiving COVID-19 Vaccinations.

Polymyalgia rheumatica (PMR) is a systemic rheumatic inflammatory disease of adults presenting with symmetrical proximal muscle stiffness and pain predominantly involving the shoulders, neck, and pelvic girdle. The coronavirus disease of 2019 (COVID-19) presented as a pandemic causing worldwide morbidity and mortality in large numbers. Rapid scientific research expedited preventative vaccine development and has helped tremendously in cutting down severe illness, hospitalizations, and death from COVID-19, with the messenger ribonucleic acid (mRNA) vaccines outperforming the others. We present two cases that showcase the incidence of polymyalgia rheumatica after receiving COVID-19 vaccination. Patient 1 is a 69-year-old female who developed arm and thigh stiffness a week before the second dose while receiving her primary Moderna vaccine series. She had an elevated C-reactive protein (CRP) and erythrocyte sedimentation rate (ESR), so she was started on low-dose steroids, which were weaned down over a five-month period. Three weeks after receiving her Moderna booster, she had a recurrence of the classic polymyalgia rheumatica symptoms and elevated ESR. She responded to prednisone 15 mg with a successful taper over eight months. Patient 2 is a 74-year-old male who received his primary series and booster through Pfizer-BioNTech. Prior to the booster, he was treated for COVID-19 with monoclonal antibody therapy. He presented to the office with hip and shoulder pain and stiffness along with an elevated C-reactive protein. Consequently, he received 20 mg of prednisone but needed to increase his dose to 25 mg total to help with the control of his inflammation. The goal of this article is to prompt physicians about the possibility of PMR incidence after patients receive vaccinations for severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). PMR can be debilitating to the quality of life of patients. Knowing this association allows for more timely and competent treatment. PMR following SARS-CoV-2 vaccinations is continuously being observed in the medical field. Increased knowledge may help prevent the recurrence with subsequent doses. Further studies on the follow-up of such cases and the effect on subsequent immunization would be helpful.