Fast Five Quiz: How Much Do You Know About Melanomas?

William James, MD


February 18, 2020

Figure 1. Malignant melanoma

Of the five different forms of melanoma, NMs represent approximately 10%-15% and are also commonly found on all body surfaces, especially the trunk of males. These lesions are the most symmetrical and uniform of the melanomas and are dark brown or black. The radial growth phase may not be evident in NMs; however, if this phase is evident, it is short-lived, because the tumor rapidly advances to the vertical growth phase, thus making the NM a high-risk lesion. Approximately 5% of all NMs are amelanotic melanomas.

For more on the types of melanomas, read here.


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