Authors: Yuya Nasu Hiroyuki Shikishima Yuji Miyasaka Yoshihiro Nakakubo Kazuomi Ichinokawa Toshifumi Kaneko
Publish Date: 2010/11/03
Volume: 40, Issue: 11, Pages: 1023-1026
Abstract
Sentinel lymph node biopsy SLNB is widely used in the detection of breast cancer metastasis and a retrospective study was conducted to determine whether the preoperative assessment of axillary lymph node metastasis using multidetectorrow computed tomography MDCT images would contribute to the selection of patients who require SLNBSeventy of the 164 patients who underwent surgery of the breast during the period of April 2006 to December 2008 were selected as subjects who 1 did not undergo preoperative chemotherapy 2 had undergone MDCT before the surgery 3 had undergone either SLNB or axillary lymph node removal during the operation and 4 whose T factor was pathologically T2 or less The diameter and shape of the largest lymph node that was identified on an MDCT image of the axilla on the affected side were measured and compared with permanent pathological specimensSize The group with lymph node metastasis included 21 subjects with an average diameter of the largest lymph node of 103 mm range 6–23 mm and the nonmetastasis group included 49 subjects with that of 71 mm 5–13 mm Shape Round lymph nodes that internally contained no fat concentration in 24 subjects and cuneate or round lymph nodes that internally contained a fat concentration in 46 subjects The observable lymph nodes that were round had a diameter of at least 10 mm and internally contained no fat concentration A were regarded as positive whereas the cuneate or round lymph nodes that measured less than 8 mm in diameter and internally contained fat concentration B were regarded as negative and both positive predictive value and negative predictive value was 100
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