1. The pyothorax, the pyopneumothorax, the spirit little may repeatedly the multiple puncture.

2. Objective To explore the methods and opportunity of the treatment of pedo-acute pyothorax.

3. Objective To explore the etiology, diagnosis and therapeutic method of pyothorax in young children.

4. Objective To study the clinical and imaging features of chronic tuberculous pyothorax associated with malignant tumors.

5. Objective To study and review the clinical experience and evaluate video-assisted minithoracotomy(VAMT) in the treatment of pyothorax and encapsulated intrathoracic fluid.

6. Infection of deep layer muscle in lumbodorsal can cause pyothorax, there are never reports before. Clinical doctors usually ignore it and miss an opportunity to treat it.

7. One dog survived 38 days and died of chronic pyothorax.

8. Methods Reformed decortication of lung was performed in 21 cases of child chronic pyothorax.

9. Objective:To evaluate video assisted minithoracotomy(VAMT) in the treatment of the subacute pyothorax and the treatment principles.