Abstract
Occult breast cancer (OBC), which is defined as clinically recognizable axillary metastatic carcinoma from an undetectable primary breast tumor, occult from conventional breast cancer screening imaging methods. This case reveals an unexpected OBC in a patient with predominantly adipose breasts, with only a few scattered areas of fibroglandular density tissue (BI-RADS® breast composition B), in which the mammographic sensitivity is approximately 90% for the diagnosis of primary breast câncer.
Highlights
Occult breast cancer (OBC), which is defined as clinically recognizable axillary metastatic carcinoma from an undetectable primary breast tumor, occult from conventional breast cancer screening imaging methods
Occult breast cancer (OBC), which is defined as clinically recognizable axillary metastatic carcinoma from an undetectable primary breast tumor, occult from conventional breast cancer screening imaging methods, comprising approximately 0.3% to 1% of all breast cancer (BC) cases [1, 2]
When metastatic tumors are detected in the axillary lymph nodes, 90% of the primary lesions of origin are breast tumors; other possible primary lesions include melanoma, lymphoma, lung cancer, thyroid cancer, gastrointestinal adenocarcinoma, and ovarian carcinoma [6]
Summary
Occult breast cancer (OBC), which is defined as clinically recognizable axillary metastatic carcinoma from an undetectable primary breast tumor, occult from conventional breast cancer screening imaging methods, comprising approximately 0.3% to 1% of all breast cancer (BC) cases [1, 2]. Breast Imaging Service of Radiology Department, United Health Group Brazil, São Paulo, Brazil Occult breast cancer (OBC), which is defined as clinically recognizable axillary metastatic carcinoma from an undetectable primary breast tumor, occult from conventional breast cancer screening imaging methods.
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