Comprehensive Screening for COVID-19 at St. Petersburg Oncology Centre

Abstract

Background. Clinical reports on the coronavirus disease 2019 (COVID-19) suggest its higher incidence and worse outcomes in cancer patients. Considering a rapid pace of the severe acute respiratory syndrome-related coronavirus 2 (SARS-CoV-2) pandemic, more data on the risk of contagion and syndrome course is required with this patient group.Aim. Estimation of the infection rate in cancer patients managed at the Oncology Centre.Materials and methods. This retrospective study included cancer patients managed at the Oncology Centre between 9 April 2020 and 27 May 2020 and routinely tested for SARS-CoV-2 in polymerase chain reaction (PCR) assays and/or COVID-19 in chest computed tomography (CT).Results and discussion. A total of 2,628 patients were included in the study, with 119 (4.5 %) confirmed to have COVID-19; 45/119 were PCR-positive, 95/119 had viral pneumonia in CT, 21/119 were positive for both tests. A total of 47.9 % cases were asymptomatic, 11.8 % revealed a mild single-symptom disease. COVID-19 ended in death in 2 (2.5 %) of 80 cases with a known outcome. In PCR results of both patient and staff screening, the virus detection rate was 3.0 % and 2.4 %, respectively (p = 0.33).Conclusion. A COVID-19 screening revealed no significant difference in the risk of contagion between cancer patients and staff of the Oncology Centre. PCR tests may perform false negative for COVID-19 in cancer patients and should be coupled with CT scanning. The infection is asymptomatic or clinically mild in most other cases.