Vol. 3, Issue 2, Part B (2020)

Abstract: The emergence of severe acute respiratory virus (SARS-CoV) that year stimulated major research into these viruses. Corona viruses usually cause respiratory symptoms, but occasionally enteric, hepatic, and neurological symptoms can also be seen. Pulmonary involvement is the most common manifestation of all three of these viruses, which may manifest as acute respiratory distress syndrome and mortality. Lung involvement is responsible for high viral transmission. Lack of autopsies and biopsies include the suddenness of the outbreak, the vast patient volume in hospitals, shortage of healthcare personnel, and the high rate of transmission, which makes invasive diagnostic procedures less of a clinical priority so trying to summarize all we know about pathological findings of COVID 19 patients. Histopathological findings included heterogeneous acute alveolar damage (DAD), predominantly lymphocytic interstitial inflammation and the identification of reactive pneumocytes and multinucleated syncytial cells. The differential diagnoses of COVID-19 pneumonia might include but are not limited to acute or chronic pneumonia resulting from other infections