New-Onset Polymyalgia Rheumatica Complicated by Giant Cell Arteritis Following COVID-19 Infection.

A 68-year-old female with a past medical history significant for tophaceous gout presented with pain and stiffness in her bilateral shoulders and hip joints for about two weeks after testing positive for COVID-19. Her laboratory results showed an elevated erythrocyte sedimentation rate (ESR) of 74 mm/h and C-reactive protein (CRP) of 25 mg/L. She showed clinical improvement in her symptoms after steroid therapy and was diagnosed with polymyalgia rheumatica (PMR). Despite prompt treatment with steroids, she continued to have persistent joint pain. Also, she developed new bilateral temporal artery tenderness, headaches, blurry vision, and jaw claudication concerning giant cell arteritis (GCA). She was admitted to the hospital for high-dose pulsed IV methylprednisolone and discharged with a steroid taper along with tocilizumab injections. Her symptoms improved rapidly, and she continued to follow up with rheumatology while continuing low-maintenance doses of prednisone. Although the association between PMR and GCA is well-known, the time it takes to reach disease remission, the rate of relapse, and the length of steroid treatment are variable. There are a few COVID-19-associated cases of PMR and GCA; however, the timeline and pathophysiology of this association remain an area for further investigation.