What are the common types of melanoma?

Spreading type. This type has a superficial eczematous appearance and is mostly developed from the infiltration of in situ melanoma. The skin around the tumor has eczematous changes. The edges of spreading eczematous malignant melanoma are irregular, the surface is uneven, and it is gray-black, gray-white, light red and other chaotic colors.

Nodular type. This type is the most common clinically. The symptoms of nodular melanoma are that the tumor is nodular and protrudes from the skin surface. The color is relatively consistent, dark brown or gray-red, and occasionally colorless. The surface of the tumor is mostly regular, or cauliflower-like, or polyp-like, or fungus-like. Ulcers often occur on the surface. The tumor often increases rapidly in a short period of time, ranging from several centimeters.

Special type: The tumor is located deep in the dermis and subcutaneous tissue, is in the form of small nodules, has clear boundaries, but has no capsule, is grayish white or grayish blue, is hard, and is often accompanied by local lymph node metastasis.

Freckle type. This type is often developed from lentigo maligna in situ. The symptoms of this type of melanoma are that the epidermis near the tumor has freckle-like characteristics. Its edges become extremely irregular, but the surface is flat, and the color is mostly brown to varying degrees, which can also be similar to the spreading type. This type often occurs on the basis of facial freckles in the elderly, but it is less common in my country.