In the management of invasive ductal carcinoma of the breast, what are the recommended initial staging investigations to detect possible metastasis?

• A. CBC and liver function tests to detect possible metastasis
• B. Routine imaging such as CT or bone scan for distant metastasis in all patients
• C. MRI of the breast alone is sufficient for staging
• D. No laboratory tests are needed before staging

Answer: (A)

The question tests what information is typically gathered at the initial staging stage to look for possible spread of breast cancer. Basic laboratory tests, specifically a complete blood count and liver function tests, are routinely done as part of the initial workup. They provide a quick snapshot of overall health and organ function and can reveal abnormalities that might suggest metastasis, such as anemia from bone marrow involvement or liver abnormalities that could reflect hepatic metastases. Importantly, these tests don’t prove metastasis by themselves, but they help flag patients who may need additional imaging or closer follow-up.

If those basic tests are abnormal or if symptoms or exam findings raise suspicion, targeted imaging—such as CT, bone scan, or PET-CT—can then be pursued to look for distant metastases. In contrast, imaging all patients routinely or relying on MRI of the breast alone for staging isn’t appropriate, and skipping laboratory testing entirely isn’t consistent with standard pre-staging assessment.