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J Nucl Med. 2008; 49 (Supplement 1):342P
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Oncology-Clinical Diagnosis: Solid Tumors

Clinical Diagnosis-Solid Tumors Posters

Detection of internal mammary lymph node metastases in 18F-FDG PET/CT images of breast cancer patients

Eun ji Han1, Joo hyun Oo1, Ie Ryung Yoo1, Young Ha Park1, Sung Hoon Kim1 and Soo Kyo Chung1

1 Radiology, The Catholic University of Korea, Seoul, South Korea

1448

Objectives: This study aims to assess the features of internal mammary node metastases in 18F-FDG PET/CT images of breast cancer patients.

Methods: Of the 1183 PET/CT images of breast cancer patients from November 2003 to September 2007, 48 cases demonstrating perceptible FDG uptake in the internal mammary (IM) nodes were retrospectively reviewed. From the PET/CT images, the peak SUV of IM node was computed. The site and size of the primary lesion, and presence or absence of accompanying axillary lymph node or distant metastases were noted from clinical history and CT or MRI.

Results: Of the 1183 breast cancer patients, 48 (4.1%) demonstrated IM node with perceptible FDG uptake on PET/CT images, and the mean pSUV of IM nodes was 3.3±3.4. Of the 48 FDG uptake perceptible cases, 6 (12.5%) had only IM node metastases. 18 cases (37.5%) had accompanying axillary node metastases. Metastases extending to lymph nodes besides internal mammary and axillary nodes were noted in 8 cases (16.7%), and metastases of bone and/or other organs were noted in 23 cases (47.9%). Excluding 9 patients without detailed medical record, there were 43 primary lesions in 39 patients, and 15 tumors (34.9%) were noted in inner portion of breast, 11 (25.6%) in central portion, and 17 (39.5%) in outer portion. Mean size of primary lesions was 3.0±1.4 cm.

Conclusions: In the PET/CT images, detection rate of IM node metastases in breast cancer patients was 4.1%. Among the IM node positive cases, the sites of primary breast tumor were distributed evenly. Most patients with IM node metastases had other metastases, but in 12.5% of the patients had only IM node metastases. IM node metastases are difficult to detect with other imaging modalities, and PET/CT images may be especially useful in patients with only IM node metastases.





This Article
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Right arrow Email this article to a friend
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Right arrow Alert me to new issues of the journal
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Google Scholar
Right arrow Articles by Han, E. j.
Right arrow Articles by Chung, S. K.
PubMed
Right arrow Articles by Han, E. j.
Right arrow Articles by Chung, S. K.