Perforation of the Sigmoid Colon in Vasculitis in COVID-19 Patients

The aim of the study was to investigate the main manifestations and pathological changes in the tissues under the sigmoid colon perforation in patients with COVID-19. Materials. The study involved analysis of medical histories of 40 patients with sigmoid colon perforation associated with COVID-19. All patients showed similar symptoms (increasing respiratory failure, dyspnea, high body temperature), followed by the development of the sigmoid colon perforation due to the violation of intravascular hemostasis. In 25% of patients, perforation developed already on the second or third day from the onset of ARVI symptoms, in 75% - on the fifth or sixth day from the onset of the disease. Results. The analysed case histories and the results of histological examination of biopsy or pathological material demonstrated similarities in the clinical presentation of the disease and morphological changes in the affected area of the sigmoid colon. The main symptoms and syndromes are presented using the example of a clinical case. Conclusion. The patient developed complications at the final stage of COVID-19 disease and this was associated with inflammation of the mesentery arteriole walls and the formation of occlusive blood clots in their lumen, which led to the development of the sigmoid colon perforation.