A member asked:

Pet scan in jan 2013 showed 4 cancerous nodules in lungs from breast cancer. new pet scan july 2013 - lung spots no longer metabolically active; does this mean they are no longer cancerous?

9 doctors weighed in across 3 answers
Dr. Blake Miller answered

Specializes in Orthopedic Surgery

Biopsy: The only way to determine that this is actually metastatic breast cancer would be to perform a biopsy and evaluate if that tissue is breast carcinoma. A pet scan just shows an increase in cellular glucose utilization, but does not tell you anything about the cell type.

Answered 7/31/2013

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Dr. Cosme Manzarbeitia answered

Specializes in Surgery

Not clear: They are likely still malignant, just not up taking the tracer. It may b a good opp to respect them if they are the only lesions seen.

Answered 7/27/2013

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Dr. Michael Ginsburg answered

Specializes in Interventional Radiology

Favorable Response: Pet provides the benefit of early identification of ineffective chemotherapy, particularly metastatic breast cancer, as various alternative treatment options are available & allows patients to be spared the toxicities of ineffective treatments. Complete metabolic response is a great prognostic indicator with significantly increased overall survival compared to patients showing no response.

Answered 12/10/2013

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