a. Solid or nodular basal cell carcinoma—smooth, translucent gray to gray-pink papules or nodules.
b. Ulcerating basal cell carcinoma—nodules with a central punched-out ulcer and a raised translucent border.
c. Pigmented basal cell carcinoma—papules, nodules, or plaques with flecks of brown pigmentation interspersed with gray translucent areas.
d. Morpheiform basal cell carcinoma—patches or plaques that are yellow or porcelain white in color with dilated surface vessels.
e. Superficial basal cell carcinoma—shallow plaques that are red-brown with a dull or scaling surface and a thready pearly border.
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