Personalized medicine is understood as the medical treatment tailored to each individual patient. This particulary appertains to the ability to identify before the onset of the therapy among a considerable number of both drugs and clinical measures the most suitable ones for any single patient, and this regardless of whether they are established or recently approved.
This ability can be particularly acquired with the help of the following tools:
A targeted cancer therapy is a drug that inhibits the growth and spread of cancer cells by interfering with a specific target molecule, what is predominantly present in the cancer cells and involved in tumor growth and progression. Since the drug attacks specifically the cancer cells, it is less harmful to the normal cells of the body: this minimizes the adverse drug reactions in the patient, which are usual in the unspecific chemotherapies.
A patient is eligible for a targeted therapy only if the target was previously demonstrated in the cancer cells. The demonstration is conducted with a specific test for the target called "companion diagnostic". The companion diagnostics can help the physicians indentifying of the appropriate drugs for their individual patients.