How are Diagnostic Mammograms different from Screening Mammograms? The difference between diagnostic and screening mammography needs to be recognised by patients and their referring doctors, since symptomatic or high-risk women require significantly different investigations from the asymptomatic routine screened patient. There is no specific time for mammography when there is a clinical indication (patient has symptoms and signs such as lumps, skin thickening, skin dimpling) for it and in this situation, this is considered a diagnostic mammogram. When it is necessary, especially when breast cancer is suspected, the sooner it is done, the better. Screening mammography is for women with no symptoms of disease. Normally this only entails 4 views of the breasts. However, if there are some areas to clarify, additional views will also be tailored for the abnormality. If widespread screening is undertaken, it has proven cost effectiveness in the over 50-year old age group. It is almost certainly cost effective in the 40-49 year age group, although this is controversial. This was discussed in the section on the Mammography Debate. Routine screening for ladies less than 40 years is normally not recommended as the dense breast tissue tends to obscure disease and active breast tissue may be more sensitive to radiation. There is no upper age limit for screening mammography, since the risk of breast cancer increases with age. |