Verrucous psoriasis is a rare variant of plaque-type psoriasis with only about 35 cases reported. The authors reported a man with a history of psoriasis vulgaris for seven years, presented with progressive verrucous hyperkeratotic plaques on both legs for three years. His earlier investigations favored the diagnosis of tuberculosis verrucosa cutis. After completing the antituberculous therapy, the lesions persisted. The later investigations favored a rare subtype of psoriasis named verrucous psoriasis.

Keywords: Verrucous psoriasis, Tuberculosis verrucosa cutis, Mycobacterium tuberculosis, Ixekixumab

DOI: doi.org/10.35755/jmedassocthai.2020.09.11241

Received 23 March 2020 | Revised 4 June 2020 | Accepted 6 June 2020