RESULTS: Mean age was 57 years, 70 % were male; and 50 % had a positive sputum culture of which 42.9 % were polymicrobial. MSSA and Streptococcus species were the most common isolates, each comprising 25 %, followed by MRSA and Pseudomonas aeruginosa, each comprising 14.3 %. Four patients (7.1 %) had an empyema requring drainage, while six patients (11 %) eventually required surgery due to medical treatment failure. Mean abscess diameter was 58 mm; the most commonly involved lobes were: right upper lobe (32.5 %), left lower lobe (27.5 %) and left upper lobe (20%). The median time to complete radiologic resolution was 16 weeks (IQR: 6.21 - 21). Abscesses < 30mm required 6.3 weeks (IQR: 3 - 14) for resolution, while abscesses between 30 - 60mm required 8.5 weeks (IQR: 6.1 - 18.3). The median time for abscesses >60mm was 16 weeks (IQR: 8.4 - 27.7) and age as well as abscess diameter were positively correlated with time to complete resolution (Pearson’s correlation coefficient = 0.51 and 0.29, respectively).