<prompt> Twenty-nail syndrome is seen inDariers diseaseLupus vulgarisLichen planusPsoriasis  <response>: Nail involvement occurs in 10 of individuals with disseminated lichen planus, and nail lesions may be the only manifestation and can destroy the nails. One, several, or all 20 nails may be involved twenty-nail syndrome, where there is loss of all 20 nails without any other evidence of lichen planus elsewhere on the body Twenty-nail dystrophy is a condition that affects the nails of the fingers and toes. This condition most commonly occurs in childhood, but it can occur at any age. Ref: Harrison 20th edition pg 1223 