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==cutaneous TB==
*estimated 1-2% of all TB patients
*diverse range of symptoms
===route of transmission===
*exogenous inoculation
**ulcer,
**tuberculosis verrucosa cutis, warty tuberculosis
**orificial tuberculosis - direct contact of ''M.t.'' contained in sputum from pulmonary TB
*endogenous spread from internal TB
**abscess,
**scrofuloderma - emerged from lymphadenitis
*hematogenous
**nodule, abscess, patch
**as part of miliary tuberculosis
**immunocompromised host, children
*tuberculid - allergic reaction against ''M. tuberculosis''
**erythema, papule
