<prompt> True regarding Keratoacanthoma:Central ulceration is uncommonKnown as Molluscum sebaceumCaused by pox virusHeals without scarring  <response>: Central ulceration is very common Known as Molluscum sebaceum Caused by pox virus is a false statement Heals with scarring as it is a severe condition Keratoacanthome KA is a relatively common low grade tumor that originates in the pilosebaceious glands and closely resemble squamous cell carcinoma SCC Lesion shows central crateriform ulceration or keratin plug that may project like a horn. 