Imaging findings of invasive micropapillary carcinoma of the breast.

Purpose: The purpose of this study is to evaluate imaging and histopathologic findings including the immunohistochemical characteristics of invasive micropapillary carcinoma (IMPC) of the breast.

Methods: Twenty-nine patients diagnosed with IMPC were included in the present study. Mammographic, sonographic, and magnetic resonance imaging (MRI) findings were analyzed retrospectively according to the American College of Radiology Breast Imaging Reporting and Data System lexicon.

Lobular lesions of the breast: imaging findings of lobular neoplasia and invasive lobular carcinoma.

The clinical and radiological diagnoses of lobular neoplasia (LN) and invasive lobular carcinoma (ILC) are difficult because they have no specific findings. The purpose of this study is to illustrate the imaging and pathological features of LN and ILC. For lobular lesions, imaging is the basic and essential diagnostic tool, so the understanding and effective use of multimodality imaging findings are important.

Metaplastic carcinoma of the breast: multimodality imaging and histopathologic assessment.

Background: Metaplastic carcinomas are ductal carcinomas that display metaplastic transformation of the glandular epithelium to non-glandular mesenchymal tissue. Metaplastic carcinoma has a poorer prognosis than most other breast cancers, so the differential diagnosis is important. Although many clinical and pathologic findings have been reported, to our knowledge, few imaging findings related to metaplastic carcinoma have been reported.