7P - Comparison of sensitivity in detection of sentinel lymph nodes in preoperative breast cancer; lymphoscintigraphy planar images v.s fusion SPECT/ pr...

Date 04 May 2017
Event IMPAKT 2017
Session Welcome reception and Poster Walk
Topics Breast Cancer
Staging procedures (clinical staging)
Basic Principles in the Management and Treatment (of cancer)
Presenter takamitsu Hamada
Authors T. Hamada, T. Komori, Y. Tanaka, H. Juri, A. Higashiyama, Y. Narumi
  • Radiology, osaka medical hospital, 569-8686 - takatsuki-shi/JP




For breast cancer, preoperative identification of sentinel lymph node (SLN) is a widely performed procedure. We reviewed the sensitivity of planar images and SPECT/CTimages.


From January 2016 to December 2016, 107 cases of preoperative breast cancer sentinel lymphoscintigraphy were performed. The age was 34-84 years old.

Firstly, Tc-99m tin colloid(111MBq) was injected subcutaneously around the tumor. After 5 hours later, four way(front, 30°and 60 oblique position, and lateral oblique) planar images and SPECT were acquired. Thereupon, the SPECT images were fused with preoperative CT images. We compared the sensitivity of planar images and fusion images of SPECT/CT.


In 95/107(88.8%), SLNs were detected on planar images, and in 96/107(89.7%), SLNs were detected on hybrid SPECT/CT images.

There was one more SLN detected by SPECT/CT. We speculate that the SLN was missed by planar imaging since it was located near the mammary gland.


Fusion SPECT/CT imaging may have a greater sensitivity in detection of SLNs in preoperative breast cancer.

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