[Para-clinical tests and follow-up of breast cancer: how do Quebec oncologists use them?].

To assess the use of complementary tests by oncologists during staging and follow-up of breast cancer patients, a study was performed comparing actual procedures with current literature recommendations. A survey concerning the use of biochemical, radiological and radionuclide tests was presented to a sample of 58 radiation oncologists and medical oncologists involved in the treatment of breast cancer patients, with a 71% response rate. During the post-treatment surveillance, respectively 3%, 24%, 37%, 76% and 96% of the physicians scheduled liver scans, liver ultrasounds, bone scans, chest roentgenograms or mammograms on a regular basis. The frequency of use of various procedures are reported with a reference to the cost-benefit ratio, a matter of current interest. Although most oncologists limit their use of diagnostic tests, some still rely on extensive work-up to detect early recurrences or metastases, an approach that remains controversial in today's literature.