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A 62-year-old female 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?

3 doctor answers9 doctors weighed in
Dr. Blake Miller
Orthopedic Surgery 14 years experience
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.
Created for people with ongoing healthcare needs but benefits everyone.
Dr. Cosme Manzarbeitia
Surgery 40 years experience
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.
Created for people with ongoing healthcare needs but benefits everyone.
Dr. Michael Ginsburg
Interventional Radiology 13 years experience
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.
Created for people with ongoing healthcare needs but benefits everyone.

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Last updated Dec 10, 2013

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