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Filter by morphology, mechanism, acuity, reaction pattern, and more. Tags are ancestor-aware — picking palm also surfaces hand and upper-extremity conditions.

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T-cell-mediated inflammatory dermatosis classically defined by the 'four P's' (purple, pruritic, polygonal papules); lichen planus pigmentosus is a distinct skin-of-color variant.

4 imagesL43.9

Lichen planus like keratosis

8 images

Melanoma

Editorial

Malignant tumor of melanocytes; acral lentiginous is the dominant subtype in Black, Asian, and Hispanic patients — often diagnosed late, with worse prognosis stage-for-stage.

220 imagesC43.9