A. Wrong, the lesion didn’t show solid nor cribriform patterns. There were no signs of malignancy such as: atypia or necrosis.
B. Wrong, basal cell adenoma is a biphasic basaloid benign salivary gland tumor. The presented lesion lacked the basal/myoepithelial arrangement, as it was formed of a monotonous syncytium of short columnar epithelial cells in glandular and ribbon-like architecture.
C. Right, the lesion was well capsulated as showed in figure 2. It was composed of a monotonous syncytium of short columnar epithelial cells in glandular and ribbon-like architecture. In some areas, the canals contained squamoid morules as in figure 4 (arrows). There was no atypia or mitotic figures. Basal/myoepithelial arrangement was not evident. Canalicular adenoma showed diffuse immunoreactivity to S100 and CK7. It should be treated conservatively.
C. Right, the lesion was well capsulated as showed in figure 2. It was composed of a monotonous syncytium of short columnar epithelial cells in glandular and ribbon-like architecture. In some areas, the canals contained squamoid morules as in figure 4 (arrows). There was no atypia or mitotic figures. Basal/myoepithelial arrangement was not evident. Canalicular adenoma showed diffuse immunoreactivity to S100 and CK7. It should be treated conservatively.
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