Effectiveness of Prophylactic Management of Depression for adult Head and Neck Ca patients

I need an introduction for my dissertation covering : – the main idea is that the prevalence of depression is higher among cancer patient in general and head and neck caner patient in specific . – researches in general studies the predictors such surgeries instead of other treatments, smoking, sever configuration, pre existing depression and genetic susceptibility. – the association with other adverse effects such as weight loss and affect partners by having depression as well or even suicide effort done guidelines, protocols and social distress scales to deal with this to improve survival but now prophylactic measurements to anticipate this were also done instead of managing this after happening and the aim of this literature review to determine the effectiveness of these measurements.