Q. A 48-year-old man with a known history of lung cancer gets admitted to the hospital for surgical resection. A medical student takes the history and performs a physical examination on this patient. While examining she observes hyperpigmented velvety plaques in both axillae. Upon further inquiry, he says that those dark spots have been there since last year and they are not itchy but look dirty. He thoroughly scrubs them while taking bath but they are not going away. If a biopsy is performed on this skin lesion, what will be the most likely findings?