I have a student who is looking for detailed data on re-operation rates in patients who have undergone lumpectomies across Canada.
Regarding your question, breast cancer surgeries are most likely available in the Discharge Abstract Database. If the student wants 100% coverage (rather than the 10% randomized sample in the DLI), they should submit a data request directly to CIHI. If this data will be used towards a graduate degree, they may be eligible to receive the data under the Graduate Student Data Access Program (GSDAP).
Link to data request form:
Information regarding the GSDAP: