A 45-year-old man presents with a slowly growing, firm, flesh-colored nodule on his scalp.
Histopathologic examination reveals a well-circumscribed, non-encapsulated dermal neoplasm composed of nests and cords of basaloid cells.
The nests exhibit peripheral palisading and are embedded in a prominent, hyalinized, eosinophilic stroma.
Notably, there are two distinct populations of basaloid cells and small duct-like structures.
Which of the following is the most likely diagnosis?
