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This study presents a detailed histopathological analysis of lung tissue from 44 deceased COVID19 patients, aiming to elucidate the mechanisms driving severe disease progression. Postmortem biopsies were systematically examined, revealing diffuse alveolar damage in 95.5% of cases, predominantly in the acute/exudative phase. Characteristic features included extensive hyaline membrane formation, alveolar septal thickening, fibrin deposition, and red blood cell extravasation. Notably, advanced fibrosis, indicative of ongoing tissue remodeling, was observed in 86.4% of cases, highlighting the chronic pathological impact of the disease. Patient demographics showed a predominance of older males with comorbidities such as hypertension and diabetes, aligning with known high-risk profiles. The methodology involved meticulous autopsy procedures and standardized histopathological assessments to ensure the reliability of findings. This study provides key insight into histological changes in the lungs of COVID-19 patients, helping to clarify the disease's progression. It provides valuable insights that may contribute to a better understanding of long COVID and the potential long-term pulmonary complications in these patients. These findings may ultimately support improved management approaches and therapeutic strategies for COVID-19 care.
Samet et al. (Tue,) studied this question.