: The infection spreads from a pre-existing internal focus.
: Occurs when bacteria enter the skin directly through a cut or abrasion. The most common form is Tuberculosis Verrucosa Cutis , often seen on the hands of laboratory workers or physicians ("prosector’s wart"). Download Tuberculose cutanГ©e pdf
: A chronic, progressive form often appearing on the face as reddish-brown "apple-jelly" nodules that can lead to significant scarring. : The infection spreads from a pre-existing internal focus
: The most common form, typically occurring when an infected lymph node or bone breaks through the skin surface, creating ulcers and sinus tracts. : A chronic, progressive form often appearing on
(TBC) is a rare and diverse clinical manifestation of Mycobacterium tuberculosis infection, representing about 1% to 2% of all extrapulmonary cases. It occurs when the bacteria, which primarily target the lungs, affect the skin through direct inoculation, spread from an underlying internal infection, or through the bloodstream. Clinical Classifications
: Bacteria travel through the blood to the skin, often in immunocompromised individuals. This can manifest as Acute Miliary Tuberculosis of the skin .