Which of the following is the most common form of malignant melanoma?
Nodular
Superficial spreading
Acral lentiginous
Mucosal
The commonest type of melanoma is the superficial spreading melanoma (SSM). The melanoma progress through 3 phases: in situ, radial growth, veical growth. NB: A primary melanoma with no recognizable adjacent in situ or radial growth phase is nodular melanoma. Melanoma with similar prevalence in all ethnic groups- acral lentiginous Ref: Rook's textbook of dermatology, Edition-8, Page-54.45.