Skin tumours are more prevalent in older patients, mainly because the immune surveillance capacity of the elderly is gradually reduced, which can lead to the development of skin tumours. In addition, there is a difference between benign and malignant skin tumours.
Generally speaking, benign tumours have clear boundaries, neat margins, smooth surfaces and are generally symmetrical; malignant tumours have unclear boundaries, uneven margins and may have ulcers and bleeding on the surface.