A general term for inflammation, often infectious or irritant-related, lacking the well-demarcated plaques and silvery scale typical of psoriasis.
Characterized by serpiginous, gray-white annular lesions with a raised border, specifically associated with reactive arthritis.
Presents as a solitary, persistent, well-demarcated, velvety red plaque on the glans or prepuce, which is a form of squamous cell carcinoma in situ.
A general term for precancerous lesions, identified by biopsy, appearing as persistent red or white plaques that do not respond to typical psoriasis treatments.
Appears as a solitary, shiny, orange-red, 'cayenne pepper' speckled plaque on the glans of uncircumcised, middle-aged to older men.
