What is the primary purpose of a biopsy in oncology?

The primary purpose of a biopsy in oncology is to provide a diagnosis and treatment plan. A biopsy involves the extraction of a sample of tissue from a suspicious area, which is then examined microscopically to determine the presence of cancer cells. This diagnostic process is crucial as it helps to confirm or rule out cancer and enables healthcare providers to classify the type of cancer, its grade, and other characteristics.

This information is essential for developing an appropriate treatment plan tailored to the individual patient's needs. By understanding the exact nature of the malignancy, physicians can recommend specific therapies, such as surgery, chemotherapy, or radiation, which may vary significantly depending on the type and stage of cancer.

Other options, while important in cancer care, do not reflect the primary function of a biopsy. Surgery may be indicated for tumor removal but is not the central focus of a biopsy. Pain assessment and monitoring weight loss are additional aspects of cancer care that are important but not directly related to the purpose of conducting a biopsy, which is fundamentally a diagnostic tool.