Which type of malignant skin lesion has the poorest prognosis?
a. Lentigo melanoma
b. Squamous cell carcinoma
c. Basal cell carcinoma
d. Nodular melanoma
ANS: D
Malignant melanoma is highly metastatic, with a higher mortality rate than basal or squamous cell carcinoma. There are three general types: lentigo maligna, superficial spreading, and nodular. Lentigo maligna melanoma appears as a slow-growing dark macule on exposed skin surfaces (especially the face) of elderly patients. The lesion has irregular borders and brown, tan, and black coloring. Prognosis is good if treated in the early stage. Nodular melanoma has the least favorable prognosis.
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