TABLE 3.
Comparison of pulmonary pathological types and imaging features among SARS, MERS, and COVID-19 patients
| Feature | Value for disease (references) |
||
|---|---|---|---|
| SARS (27, 29, 197–199) | MERS (30, 170, 200) | COVID-19 (31, 32, 120, 201) | |
| Pathologic types | DADa | DAD | DAD? |
| Bilateral pneumonia | 30% | 85.7% | 76% |
| Unilateral pneumonia | 70% | 14.3% | 24% |
| Ground-glass opacity | 63% | 65.5% | 86% |
| Peripheral distribution | 75% | 58% | 86% |
| Lower lung zone | 64.8% | 79.1% | 67% to ∼76% |
| Consolidations | 36% | 18.2% | 29% to ∼55% |
| Unifocal involvement | 54.6% | 69% | 29% |
| Multifocal involvement | 45.4% | 31% | 71% |
| Pneumothorax | 12% | 16.4% | 1% |
a
DAD, hyaline membrane formation was observed with exudate in the alveoli, and membranous organization was seen with the occlusion of alveoli, dilation of the alveolar ducts and sacs, and collapsing of the alveoli.