Persistent abnormal opacity in the left upper hemithorax, which may represent a hemothorax considering recent interventions. Differential considerations include pleural effusion and airspace consolidation; atelectasis is less likely due to the absence of significant volume loss. There is little interval change compared to the prior study.
Air space opacity–multifocal (Uncertain) Simple pleural effusion (Uncertain) Atelectasis (Absent) Loculated pleural effusion (Uncertain)