Apple jelly nodules on diascopy shown below are seen in?
Scrofuloderma
Lupus vulgaris
Lichen scrofulosorum
Tuberculosis verrucosa cutis
Lupus vulgaris is the most common type of cutaneous TB. Presence of apple jelly nodules at the edge of a plaque. Apple jelly nodules on diascopy- erythematous lesions will turn from pink to golden brown. They do not exhibit this color on Indian skin. In European cases the lesions occur on face paicularly about the nose and on the cheek with frequent involvement of the mucous membrane of then nose and the lips. In India, buttocks, thighs, and legs are common site of involvement. These nodules are not invariably found in all cases and their presence is not pathognomonic of lupus vulgaris.
Mycobacterial Infections