A 12-year-old boy had a gradually progressive plaque on a buttock for the last 3 years. The plaque was 15 cm in diameter, annular in shape, with crusting and induration at the periphery and scarring at the centre. The most likely diagnosis –

This boy has Annular plaque On buttock Crusting at periphery Scarring at centre These suggest the diagnosis of lupus vulgaris. Annular lesions  When the lesions of a skin disease are arranged in ring shape, they are called annular lesions.