Abstract
A case of ductal carcinoma in situ (DCIS) that was treated by partial mastectomy is reported. The operation was performed after accurate estimation of cancer spread by three-dimensional computed tomography (3D-CT). The patient was a 39-year-old woman without a palpable lump who had a bloody nipple discharge. Ultrasonography showed distended mammary ducts with intraductal components. Fine needle aspiration cytology revealed ductal carcinoma. Galactography showed two subsegmental ducts and peripheral branches in the upper-inner quadrant of the right breast. 3D-CT depicted a well enhanced segmental-clumped lesion including two subsegments of a duct lobular system shown in galactograms. DCIS was diagnosed and partial mastectomy following the video assisted thoracoscopic surgery (VATS) marker insertion was performed, after cancer spread was accurately diagnosed by 3D-CT guidance. DCIS resected by minimally sufficient partial mastectomy with negative surgical margins was diagnosed histopathologically.
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