Skin cancer patients undergoing etoposide, prednisolone, vincristine, and cyclophosphamide therapy may have hyperpigmentation of the teeth and tongue. Ind-Am. J Pharm. Bio. Sci. 2022;20(4):121-125. Accessed October 9, 2026. https://iajpb.org/index.php/iajpb/article/view/140