Table 1 The background diseases in the patients

Malignant disease

59

Collagen disease

20

Inflammatory disease

17

Infection

13

Benign tumor

11

Renal disease

10

Hepatitis

6

Gynecological disease

2

Pneumonia

2

Trauma

2

Meningitis

1

Hip necrosis

1

Labyrinthine syndrome

1

Headache

1

Spinocerebellar degeneration

1

Asthma

1

Total

148