Knotig polypoides collagenoma, (solitary, nodular non-pigmented lesion). Dermatoscopy: Radially arranged, tortuous and partially branched vessels with white structureless area and white plaques. DD: Knotig basalioma, pilomatrixoma, sebaceous gland hyperplasia.
Vitiligo: generalized vitiligo in a young Ethiopian. sharply defined, almost symmetrically arranged depigmentations, mostly of large and small area. on close inspection, further, multiple, less sharply marked incompetently depigmented spots (grey-brown stains) can be found.
Condylomata acuminata. 22-year-old colored patient with small, brownish, partly confluent, continuously increasing papules on the prepuce and penis shaft. Typical condylomas are also found on the glans penis, perianal and anal canal.
Cheilitis actinica chronica: whitish, non-scalying plaques of the lower lip in severe actinic elastosis; the border between lip red and normal skin is blurred.
Lichen planus mucosae: less symptomatic white plaques on the buccalmucosa and on the mucous membrane of the tongue, known as exanthematic lichen planus
Pityriasis versicolor alba. 17-year-old female patient who noticed these white patches after a summer vacation, which became more pronounced as the tan increased. Disseminately distributed (non-symmetrical), 0.2-0.4 cm large, roundish white patches confluent to larger areas (right side of the thorax). The spatter-like distribution pattern is typical for pityriasis versicolor.
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