Which of the following is a primary source for cancer registry data collection?

• A. Health surveys
• B. Physician referrals
• C. Hospital discharge summaries
• D. Cancer clinical trials

Answer: (C)

The primary source for cancer registry data collection is hospital discharge summaries. These summaries are critical because they provide detailed information regarding a patient's diagnosis, treatment, and outcomes during their stay in the hospital. They include the necessary data elements such as the type of cancer, stage, treatment modalities used, and often the patient's demographics. This level of detail makes hospital discharge summaries a fundamental resource for cancer registries to ensure accurate and comprehensive data collection for each case.

Other options, while potentially useful for supporting information or supplementary data, do not serve as the primary source in the same way. For example, health surveys may provide general insights into population health trends but lack the detailed clinical information specific to individual cancer cases. Similarly, physician referrals might indicate which patients have been sent for further evaluation but do not contain the thorough clinical data that hospital discharge summaries do. Cancer clinical trials focus on specific research studies and the participants involved, but they do not encompass the broader scope of cancer cases that are recorded in a registry. Thus, the hospital discharge summary stands out as the primary and most reliable source of data in cancer registry operations.