Thrombocytopenia in Anti-neutrophil Cytoplasmic Antibody-Associated Vasculitis Indicating the Presence of Cytomegalovirus Infection: A Case Report

Abstract

Although cytomegalovirus (CMV) usually colonizes the human body without causing symptoms, CMV infections often develop in immunocompromised hosts. Immunosuppression can trigger CMV infection, and its prediction is essential; however, this is challenging without specific criteria.We present the case of an 87-year-old male patient who visited a rural community hospital with the chief complaint of persistent cough, productive of bloody sputum. Initially, the patient developed thrombocytopenia without any abnormalities of liver function; however, a positive myeloperoxidase antineutrophil cytoplasmic antibody (ANCA) test and the presence of alveolar hemorrhage and glomerulonephritis confirmed ANCA-associated vasculitis. The patient's symptoms and thrombocytopenia resolved transiently after treatment with prednisolone and rituximab. However, the recurrence of thrombocytopenia and the appearance of urinary intracytoplasmic inclusion bodies during the treatment course were investigated using an antigenemia test, which ultimately confirmed CMV viremia. Valganciclovir treatment resolved all the symptoms. This case report showed that thrombocytopenia might indicate the presence of CMV infection in ANCA-associated vasculitis and that intracytoplasmic inclusion bodies in immunosuppressed patients require investigation of CMV infection for effective treatment.

Diagnosis of Rheumatoid Vasculitis From Ischemic Change in Hands: A Case Report

“…General physicians should consider the possibility of RV in older patients with RA when symptoms exacerbate. General physicians should be vigilant about the onset or exacerbation of symptoms in older patients [7][8][9]. This may not just be a progression or flare-up of RA but could also indicate the development of RV.…”