Results: 109/675 patients with DVT were found cancer (16.1%), of whom the mean age of cancer group was 58.2 ± 13.4 years old (21 - 93), higher than that from free cancer group of 52.8 ± 19.0 years old (16 - 94) (p <0.05), cancer was seen most frequently in the age group of 51 - 60 (36.7%).