1 INTRODUCTION
The fight against coronavirus disease (COVID-19) disease continues globally. All aspects of scientific research on this subject are of great importance. The clinical picture of COVID-19 in adults ranges from asymptomatic infection to severe pneumonia that may be associated with multi-organ failure.1
Several comorbidities have been associated with the clinical course and severity of the disease as well as mortality in patients with COVID-19.2 Among these, the most common chronic systemic diseases (CSD) include hypertension, diabetes mellitus and coronary artery diseases.3 Patients with cancer are more susceptible to infections due to additional CSD, poor general health and immunosuppressive conditions caused by anticancer treatments.4 Therefore, they have a higher risk of being infected with SARS-CoV-2 and a poor prognosis.5There are many studies which examine the relationship of cancer and CSD with COVID-19.6,7 The purpose of our study was to evaluate patients who had cancer and/or CSD or no comorbidities who received COVID-19 treatment in our hospital by grouping them in terms of clinical and laboratory parameters, intensive care requirement and survival. In addition, it was planned to determine whether there was a difference between the effects of cancer and CSD on COVID-19, and if there was a difference, which condition affected patients with COVID-19 more and why.