| Summary: | Although invasive ductal carcinoma accounts for 75% of all primary breast cancers diagnosed, there are other, more uncommon kinds, including invasive cribriform carcinoma (ICC). Invasive cribriform carcinoma has 2 subtypes: pure and mixed. Ultrasonography and magnetic resonance imaging are the best imaging methods for assessing the characteristics of breast ICC (MRI). Our goal in this article was to report a rare instance of breast ICC in a 38-year-old Vietnamese woman. During a clinical examination, a spherical mass in the left breast without ipsilateral axillary lymph nodes was seen. On ultrasonography, the lesion was classified as BI-RADS 4C. The lesion was with an apparent diffusion coefficient value of 0.46 × 10−3 mm2/s. Lesion showed a quick initial increase on dynamic T1-weighted imaging with contrast enhancement, followed by a wash-out in the delayed phase. The final histopathological findings confirmed the presence of ICC.
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