Other forms of cutaneous tuberculosis are: lupus vulgaris, scrofuloderma, lichen scrofulosorum, erythema induratum and the papulonecrotic tuberculid.

But it can occur anywhere in the skin, such as in the sole of the feet, in the anus, and, in the case of children from developing countries, in the buttocks and knees.

This is because children from countries of high incidence of tuberculosis can contract the lesion after contact with tuberculous sputum, by walking barefoot, sitting or playing on the ground.

It evolves to an annular red-brown plaque with time, with central healing and gradual expansion in the periphery.

[citation needed] The diagnosis is confirmed by a skin biopsy and a positive culture for acid-fast bacilli.