Original Research Article Introduction: Cancer is a major health challenge all over the world. It has devastating effect on individual, family and society. The number of cancer deaths worldwide has been considered to be about 4 million each year. An estimated 12.66 million people were diagnosed with cancer across the world in 2008, and 7.56 million people died from the disease. During the past century, cancer has emerged as the most challenging problems for public health systems in medium-and low-resource countries.

Original Research Article Introduction: Like many other countries in the world cancer in Bangladesh is one of the major killer diseases. Along with many other countries, Bangladesh has an increasing number of cancers, primarily because of cigarette smoking, chewing of betel nut/betel leaf and exposure to several oncogenic microorganisms and other carcinogens ubiquitous and also for coupled with lack of screening, awareness and poor health seeking behaviors associated with poverty, malnutrition, and illiteracy. Aim of the study: To assess the risk of smoking in patients with malignant tumor.