If your MDT thinks it is possible to cure your bile duct cancer, surgery will be needed to remove any cancerous tissue. Depending on the extent of the cancer, it may be necessary to remove: 1  the part of your bile duct that contains cancerous cells. 2  your gallbladder.
Data extraction. Data extraction is the act or process of retrieving data out of (usually unstructured or poorly structured) data sources for further data processing or data storage (data migration).
Overview of Extraction. Extraction is the operation of copying data from a database into a file or onto a network connection. This is the first step of the ETT process: data must be extracted from the source system(s) so that this data may be subsequently transformed and loaded into the data warehouse.