Tumor samples refer to small pieces or fragments of a tumor that are taken from a patient for examination and analysis. These samples can be obtained through biopsy, surgery, or other procedures, depending on the type and location of the tumor. The purpose of obtaining these samples is to gain information about the characteristics of the cancerous growth, such as its size, shape, appearance, and genetic makeup. This information is crucial for determining an appropriate treatment plan for the patient, including whether surgery, radiation therapy, chemotherapy or other forms of treatment are necessary. In summary, tumor samples provide valuable diagnostic information that helps doctors to effectively treat cancer patients.