Lichen planus verrucosus: Large, coarse, brownish to brownish-red plaques with a verrucous surface that have been present for 6-7 years. There is itching, and several scratch artefacts have been found in the vicinity of the skin lesions.
Squamous cell carcinoma of the skin: chronically persistent, for several years existing, slowly progressing in size, weeping and bleeding for 12 months, rough, red, rough, crusty plaque on the right forearm of an 85-year-old patient. Before histological confirmation of the correct diagnosis, the disease was misdiagnosed as psoriasis and fungal disease by several practitioners due to the unusual localization.
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