Imaging Features and Pathological Analysis of 43 Parotid Basal Cell Adenomas
A 56-year-old woman of a solid-type BCA. (a, b) Transverse grayscale ultrasonographic image of a 56-year-old woman. An ill-defined, regular, mixed echo mass with heterogeneous internal architecture and with calcification without light posterior enhancement in the right parotid gland. (c) A small amount of blood on Doppler B. (d) Plain computed tomography scan showing a regular, ill-defined, uneven mass with low density and calcification. (e, f) (solid) Tumor cells are arranged in a sheet or island structure, and some are with heteromorphic; extensive cribriform structures are present (×200); Scar bar. (g) Tumors are invading the fat cells (×100).