Transient Fanconi Syndrome in a Child with Acute COVID-19 Infection: Correspondence.

To the Editor: We would like to correspond on the article entitled “Transient Fanconi Syndrome in a Child with Acute COVID-19 Infection [1].” Sengupta et al. reported an interesting case and discussed renal pathology directly resulting from viral infection. Indeed, a renal problem in COVID-19 is possible. There are many possible pathomechanisms including immunopathological process [2]. In the present case, transient clinical problem and recovery after good fluid therapy is an interesting phenomenon. A likely underlying pathogenic cause in this case might be a temporary pathological process, which should not be a direct, permanent renal damage by pathogen or abnormal immunity. In COVID-19, an increased blood viscosity occurs and might result in hyperviscosity problem [3]. A transient problem might be due to increased viscosity during COVID-19 illness. The good fluid replacement care can help resolve the problem and might be associated with transient occurrence of the problem.