Giant cell arteritis in conditions of coronavirus infection (clinical case)

The complexity of timely diagnosis of giant cell arteritis (GCA), as the most common form of systemic vasculitis in the elderly, is due to the nonspecificity of clinical manifestations and the absence of specific immunological markers. New difficulties arise during the period of coronavirus infection, which manifests itself in similar syndromes and at the same time can provoke immuno-inflammatory rheumatic disease. In this regard, it is extremely important to make a correct differential diagnosis between persistent viral infection and the development of systemic vasculitis. This article presents a clinical observation demonstrating the complex process of diagnosis and differential diagnosis of GCA in the conditions of the COVID-19 pandemic. The patient was hospitalized due to a confirmed coronavirus infection. However, despite the standard therapy and the achieved eradication of the coronavirus, the symptoms characteristic of GCA and polymyalgia rheumatica (PR) persisted. A precision analysis of the clinical picture allowed us to establish that the typical manifestations of GCA and PR occurred in the period preceding COVID-19 infection. Subsequent in-depth examination made it possible to verify the diagnosis of GCA and PR based on the current classification criteria. The therapy with glucocorticoid and methotrexate made it possible to achieve remission. The presented observation will help to raise awareness of general practitioners and related specialties about the need to rule out GCA and PR in the case of prolonged unexplained fever, myalgia, headache, joint pain and swelling, transient visual disturbances, jaw claudication in elderly patients in the setting or after coronavirus infection.