Breast Ultrasound Normal Vs Invasive Ductal Carcinoma (IDC) | BI-RADS 4/5 Masses | Breast Cancer USG
Автор: Dr. Sam's Imaging Library
Загружено: 2024-12-13
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Breast Ultrasound Normal Vs Invasive Ductal Carcinoma (IDC) | BI-RADS 4/5 Masses | Breast Cancer USG
BI-RADS Category 4: Suspicious Abnormality
Findings are suspicious for malignancy, but they do not have the classic features of cancer. The likelihood of malignancy is greater than 2% but less than 95%.
4A (Low suspicion): Likelihood of malignancy is 2%-10%.
4B (Moderate suspicion): Likelihood of malignancy is 10%-50%.
4C (High suspicion): Likelihood of malignancy is 50%-95%.
BI-RADS Category 5: Highly Suspicious for Malignancy
Findings have a very high probability of malignancy, with the likelihood of cancer being greater than 95%.
Invasive Ductal Carcinoma
Hypoechoic/heterogeneous mass
Shape: Irregular or spiculated
Taller-than-wide orientation: Vertical dimension exceeds the horizontal.
Heterogeneous: The internal structure may show mixed echotexture due to necrosis, fibrosis, or tumor heterogeneity.
Shadowing: Posterior acoustic shadowing is common in early stages (grade 1) due to the desmoplastic reaction (dense fibrous tissue formation) with IDC.
BI-RADS 5: Biopsy is strongly recommended
Increased vascularity: Color Doppler ultrasound may reveal increased blood flow within or around the lesion, indicating angiogenesis.
Microcalcifications: Appear as hyperechoic dots in the mass.
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