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Basal Cell Adenoma

slide 95 of 110

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This high power view of a basal cell adenoma shows anastomosing basaloid cell nests with a jigsaw puzzle-like appearance. The nests contain eosinophilic basement membrane-like material and are surrounded by hypocellular stroma containing a few myoepithelial cells.

This type of growth pattern may raise suspicion for adenoid cystic carcinoma. The presence of stromal myoepithelial cells serves as a clue. Stromal myoepithelial cells are absent in adenoid cystic carcinoma.

slide 95 of 110