Findings on thoracic ultrasound (TUS)
| Finding on TUS | Numbers (n = 102) |
| Simple effusion | 77 |
| Small | 31 |
| Moderate | 29 |
| Large | 17 |
| Septae in effusion | 9 |
| Collapse/consolidation | 14 |
| Pleural thickening | 4 |
| Other findings | 11 |
The size of the effusion on TUS was estimated to be small if <1 cm in depth, moderate if 1–3 cm in depth and large if >3 cm in depth. Other findings included mass lesions, consolidation and a raised hemidiaphragm.