Cutaneous Tuberculosis: Clinicopathologic Arrays and Diagnostic Challenges

Table 2

TST result in different forms of cutaneous tuberculosis.

Clinical forms of cutaneous tuberculosis	Tuberculin skin test result
Tuberculosis chancre	initially negative, but becomes positive during course of disease (usually after 15 days)
Tuberculosis verrucosa	strongly positive
Lupus vulgaris	usually positive
Scrofuloderma	strongly positive
Orificial tuberculosis	negative
Acute cutaneous miliary tuberculosis	negative
Papulonecrotic tuberculoid	positive
Lichen scrofulosorum	positive
Erythema induratum of Bazin	positive