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Clin Nucl Med. 2008 Mar;33(3):175-80. doi: 10.1097/RLU.0b013e318162ddee.

FDG-PET on the trail of an unsuspected primary malignancy in the breast.

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  • 1Department of Imaging Sciences, University of Rochester Medical Center, Highland Hospital, 601 Elmwood Avenue, Rochester, NY 14642, USA.


Proper identification of the primary malignancy can radically alter clinical management for the patient's benefit. This is a report of an unsuspected primary breast cancer in a patient being worked up for presumptive lymphoma. Prior investigation of lymphedema in the left lower extremity found widespread lymphadenopathy on computed tomography imaging, leading to initial biopsy revealing adenocarcinoma of unknown primary. F-18 fluorodeoxyglucose PET/computed tomography altered management by localizing an F-18 fluorodeoxyglucose avid breast nodule, directing breast biopsy with specific immunohistochemical analysis for breast cancer lineage in metastatic adenocarcinoma. The patient responded well to breast cancer-targeted chemotherapy.

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