<s>[INST] Hello doctor, I have a mark on my toe that has been there a few years and although my GP was not concerned, I am very scared it could be melanoma. It has not changed dramatically but it could have changed subtly as in some photos it looks a little darker and others a little bigger, although it is hard to tell due to changes in lighting. [/INST] Hello. I have viewed the images (attachment removed to protect patient identity). It seems a benign nevus, well-defined, regular, and uniformly colored. Moreover, it has not changed over the years. However, dermoscopy is the best way to be sure about that, as benign nevi have pigment along the furrows rather than the ridges of plantar dermatoglyphics (parallel furrow pattern) whereas melanoma also has pigment along the ridges (parallel ridge pattern) on dermoscopy. For more information consult a dermatologist online --> </s>