case_images: PMC10625316_01
case_images: (A and B) Chest CT image before treatment. (C) Pathological examination showed numerous neutrophils (as shown by the red arrow), few mesothelial cells, and lymphocytes in the smears and sediment. (D) Chest ultrasound indicates massive effusion (as shown by the red arrow).
case_images: IDR-16-6975-g0001.jpg
case_images: PMC10625316_01_IDR-16-6975-g0001.jpg
case_images: f0001
case_images: Chest CT scan (Figure 1): There was a large cystic lesion in the left lung (with fluid level suggestive of abscess formation, and localized lung involvement), thickening of the left diaphragmatic pleura, and minimal pleural effusion on the left side.  Ultrasound-guided percutaneous chest tube (8 French) placement was performed to drain the abscess fluid (Figure 1). P. gingivalis (sequence count: 3985; relative abundance: 6.48%), Streptococcus milleri (sequence count: 1258; relative abundance: 2.05%), Schaalia cardiffensis (sequence count: 631; relative abundance: 1.03%), and Treponema socranskii (sequence count: 437; relative abundance: 0.71%). Pathological examination showed numerous neutrophils, few mesothelial cells, and lymphocytes in the smears and sediment (Figure 1).
case_images: Follow-up chest CT after thoracic drainage and 1 week of meropenem anti-infective treatment. (A) Lung windows (B) Mediastinal windows.
case_images: IDR-16-6975-g0002.jpg
case_images: PMC10625316_01_IDR-16-6975-g0002.jpg
case_images: f0002
case_images: A follow-up chest CT showed reduced fluid and the formation of empyema (Figure 2).
case_images: Follow-up chest ultrasound indicated a small pleural effusion (as shown by the red arrow) after 4 weeks.
case_images: IDR-16-6975-g0003.jpg
case_images: PMC10625316_01_IDR-16-6975-g0003.jpg
case_images: f0003
case_images: After 4 weeks, the patient's chest ultrasound revealed a small amount of pleural effusion (Figure 3).