The difference between melanoma and nevus

summary

Some time ago, I found that my toe suddenly grew a mole, protruding from the surface of the skin. Originally thought it was a mole, did not care, a friend reminded me that melanoma and mole look very similar, let me pay attention. I just looked up the difference between melanoma and nevus. Now let's share the difference between melanoma and nevus.

The difference between melanoma and nevus

From the shape, the two halves of common nevus are symmetrical, while the two halves of malignant melanoma are asymmetrical. The edge of common nevus is smooth and clearly demarcated from the surrounding skin, while the edge of malignant melanoma is irregular and serrated.

From the appearance, melanoma is rough with scaly or flaky desquamation, sometimes with exudation or bleeding, and the lesion is higher than the skin. Common nevus is usually brown, brown or black, while malignant melanoma will be mixed with pink, white and blue black on the basis of brown or brown. Among them, blue is the most ominous, while white indicates that the tumor has spontaneous degeneration. Nodular malignant melanoma is always blue black or gray. The diameter of common nevus is generally less than 5 mm, while that of malignant melanoma is more than 5 mm.

From the change process, if melanoma continues to develop, it is likely to have ulcerative lesions, stinging or burning pain will be more obvious, and satellite nodules or regional lymph node enlargement will appear around it, which indicates that the disease has progressed to advanced stage.

matters needing attention

It should be emphasized that it is difficult to distinguish the dysplastic nevus from the early malignant melanoma only by naked eye observation. Biopsy should be carried out in time to obtain the pathological diagnosis of the suspected lesions.