SNO

Aetiology

Number

Percentage (%)

1

Parapneumonic effusion (PPE)

34

37.8

2

Idiopathic

14

15.6

3

Post surgical

2

2.2

4

Trauma

5

5.6

5

Spontaneous pneumothorax

2

2.2

6

Oesophageal perforation

1

1.1

7

Subdiaphgramatic infection

3

3.3

8

Septicemia

4

4.4

9

Osteomyelitis of ribs

3

3.3

10

Breast cancers

5

5.6

11

Bronchogenic carcinoma

6

6.7

12

Tuberculosis

10

11.1

13

Osteomyelitis of vertebrae

1

1.1

Total

90

100