Diagnostic confirmation is grouped under which abstracting section?

• A. Patient Identification
• B. Cancer Identification
• C. Stage of Disease at Diagnosis
• D. First Course of Treatment

Answer: (B)

Diagnostic confirmation focuses on establishing that a malignancy is present and correctly classified, using pathology, cytology, imaging, or clinical criteria. In cancer registry abstraction, this information belongs under Cancer Identification because it documents the cancer’s identity—its site, histology, and the formal basis of the diagnosis. This is separate from staging, which describes how advanced the disease is, or from treatment, which records what was done first, or from patient identifying details.