Abstract
Purpose
To retrospectively investigate the imaging [mammographic, ultrasonographic (US), magnetic resonance (MR) imaging] features and standardized uptake values (SUV) in positron emission tomography (PET)/computed tomography (CT) of triple-negative breast cancers (TNBC) and to compare them with breast cancers that are either estrogen receptor (ER) positive or progesteron receptor (PR) positive.
Materials and Methods
155 breast cancers cases were identified in 134 women (mean age, 51 years; range, 31-86 years). Surgically confirmed TNBC (n = 27) and ER-positive/PR-positive breast cancers (n = 81) were included among them. Cancers were investigated with mammography (n = 81), US (n = 106), MR imaging (n = 34) and PET-CT (n = 59). Mammographic findings are identified by detection of characteristic masses and microcalcifications. US findings included tumor size, margin, tumor shape, calcification and posterior shadowing. MR findings included tumor size, shape, margin, internal enhancement, intratumoral signal intensity and kinetics. Peak SUVs (p-SUV) of breast cancers were evaluated in PET/CT. These findings were compared with TNBC and ER/PR positive groups.
Results
Mammographic findings had no significant association with the TNBC. High pathological grade (p < 0.05), larger than 2 cm in size, well-marginal mass, and round or oval-shaped (p < 0.05) is US were significantly associated with TNBC. In MR imaging, round mass shape (p < 0.05), well-circumscribed mass margin (p < 0.05), rim enhancement (p < 0.05), were significantly associated with TNBC. The peak SUV of TNBC tend to be higher than that of ER-positive/PR-positive breast cancer (7.95 ± 5.50 vs. 4.91 ± 3.00, p < 0.05).
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