Table 1: Distribution of primary tumor sites.

Primary tumor siteNumber of patientsPercentage (%)

Lung97014.43
Breast96714.39
Large intestine6549.73
Haematopoietic and lymphoid tissue6449.58
Kidney4917.31
Ovary4907.29
Liver4005.95
Central nervous system3775.61
Prostate3745.56
Endometrium2613.88
Pancreas2523.75
Autonomic ganglia2223.30
Skin1842.74
Oesophagus1742.59
Urinary tract1101.64
Upper aerodigestive tract911.35
Stomach600.89