Keratoacanthoma Growth phases | Dermatology Education Keratoacanthoma Growth phases Video
July 23, 2019

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  • Keratoacanthoma Growth phases

    Three growth phases are described:

    1. Proliferative phase: a solitary papule appears suddenly and then rapidly grows to its maximum size over 2 to 4 weeks.

    2. Mature phase: the lesion is stable in size and appearance for weeks to months; it may appear crateriform if the core has been partially removed.

    3. Resolving phase: the base becomes indurated, the central core is expelled, and the base resorbs, leaving a pitted scar. This phase may last several months.