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Giant keratoacanthoma arising in hypertrophic lichen planus


  • Leah M Giesecke, MB BS. Catherine M Reid, FACD. Craig L James, FRAPA. Shyamala C Huilgol, FACD.

Dr Leah Giesecke, Department of Dermatology, Flinders Medical Centre, Flinders Drive, Bedford Park, SA 5042, Australia. Email:


A 45-year-old man presented with a rapidly enlarging tumour in an area of long-standing hypertrophic lichen planus of the lower leg. Histological examination of the resected specimen showed it to be a giant keratoacanthoma measuring 37 × 57 mm. Neoplastic change is a rarely reported complication of chronic variants of cutaneous lichen planus. To date there have been only two reports of keratoacanthoma development in association with lichen planus.

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