PET Scan in Cancer: When Do We Really Need It?
Understanding the correct role of PET-CT in oncology to avoid unnecessary tests Positron Emission Tomography–Computed Tomography (PET-CT) has become one of the most valuable imaging tools in cancer care. It helps detect cancer spread, guides treatment, and monitors response. However, many patients today are advised PET scans even when they’re not truly required. Overuse of PET not only increases cost but can also mislead treatment decisions. Let’s clearly understand where PET-CT is essential and where it is NOT needed in oncology. ☑️ When PET-CT is Required in Cancer Care 1. Staging of Certain Cancers Before Treatment PET helps identify cancer spread and decide treatment intensity. It is essential for: Lung cancer Lymphomas (Hodgkin & Non-Hodgkin) Head & neck cancers (except early oral cancers) Esophageal cancer Melanoma Carcinoma of unknown primary (CUP) 2. Detecting Recurrence or Residual Disease After treatment, PET-CT is helpful when: T...

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