Case for 2018 Dermpedia Course: A very common biopsy: rule out psoriasis or SCC

    A 64 yo M with history of treated psoriasis presented with 3 mo history of persistent erythematous plaque on his left shin. The plaque did not respond to triamcinolone treatment.

    Clinical considerations included SCC and psorisis.

    Diagnosis to be revealed at Dermpedia Course