Verrucous growth arising over hypertrophic lichen planus

Multiple keratoacanthoma and oral lichen planus successfully treated with systemic retinoids and review of multiple keratoacanthoma associated with lichen planus

“…In 13 articles of multiple KA associated with lichen planus (LP) from 1981 to 2017 published in English which are shown in Table , KA lesions in 10 cases developed in hypertrophic LP . In other words, KA lesions associated with but not arising in LP are rare.…”

Multiple pruritic plaques on scrotum-what is your diagnosis?

“…[2] Two cases of keratoacanthoma in association with final diagnosis-hypertrophic LP have been reported. [3]…”

Perigenital warty lesions-what is your diagnosis?

“…[ 3 ] The underlying mechanism of this malignant conversion is not exactly known, but speculatively, chronic inflammatory processes show an overdrive of growth factors that constantly stimulate epithelial cell proliferation into neoplastic conditions. [ 4 5 ] An average time of 12 years may lapse between the diagnosis of hypertrophic LP and the onset of squamous cell carcinoma (SCC), prompting regular follow up of HLP cases for long period is essential. There should be no reservation for biopsy.…”

“…Two cases of keratoacanthoma, both occurring on the lower legs in association with HLP have been reported. [ 4 ]…”