Fig. 2From: Sonographic and pathological features of metaplastic squamous cell carcinoma of the breast: a case seriesPure squamous cell carcinoma (Pure SCC). (Proportion of squamous cell carcinoma was 100%). A Two-dimensional ultrasonography (US) revealed a mixed echoic mass with an irregular shape (large cystic areas, and posterior enhancement. B Color Doppler ultrasound showed increased color flow signals in the solid part of the mass. C Spectral Doppler ultrasound showed a high resistive index in the feeding artery. D Histopathological examination revealed squamous epithelial differentiation and keratinization in the tumor (hematoxylin–eosin, × 100)Back to article page