Table 2.

Radiological investigations of the patients included in the study

	Patient number = 194; cases = 214
X-Ray results
Performed	128 (60)
Effusion	126 (98)
Meniscus	62 (48)
Infiltrate	39 (30)
Suspicion of empyema	4 (3)
CT-scan findings
Performed	139 (65)
Effusion	139 (100)
Infiltrate	52 (37)
Nodule/Tumor	49 (35)
Enhancement	20 (14)
Suspicion of empyema	18 (13)
Ultrasound findings
Performed	189 (88)
Hyperechogenicity	19 (10)
Septa	42 (22)
Massive organisation	35 (19)
single category	73 (34)
Macroscopic bronchoscopy findings
Performed	73 (34)
No pathological finding	24 (33)
Non-purulent secretion	23 (32)
Erythema of the mucosa	20 (27)
Purulent secretion	17 (23)
Endobronchial tumour	8 (11)
Bloody secretion	5 (7)