The diagnosis is confirmed by a skin biopsy and a positive culture for acid-fast bacilli. A PPD test may also result positive.
Tuberculosis verrucosa cutis
Tuberculosis cutis orificialis
Diabetic dermadrome
Ichthyosis bullosa of Siemens
Granuloma faciale
Granuloma annulare
Lichen myxedematosus
Lymphogranuloma venereum