Individual lesions heal with varioliform scarring.
The tuberculids represent a form of cutaneous hypersensitivity reaction to tuberculosis antigens. Though several types of tuberculids have been described, most are now discounted as not uniquely relating to the presence of tuberculosis infection. Papulonecrotic tuberculid and lichen scrofulosorum are still accepted by most authors as representing true tuberculids. The tuberculids were first described by Darier in 1896, and Pautrier first established papulonecrotic tuberculid as a distinct tuberculosis-associated disorder in 1936 when he described the characteristic clinical and histopathologic features. The pathophysiology of PNT is controversial.