Imaging Features and Pathological Analysis of 43 Parotid Basal Cell Adenomas
A 20-year-old woman with a membrane-type BCA. (a) Transverse grayscale ultrasonographic image of a 20-year-old woman. There is an ill-defined, regular, hypoechoic mass with heterogeneous internal architecture and without posterior enhancement in the right parotid gland. (b) Intramodular prominent vascularity on Doppler B. (c) Plain computed tomography scan showing an ill-defined regular mass with uneven low density. (d) Hematoxylin and eosin (HE) staining: (membrane type) thickened basement membrane-like substance around a cell mass (×200), scar bar. (e) HE staining: tumor cells invade the capsule (×100).