Isolated peripheral tuberculous lymphadenitis in adults: current clinical and diagnostic issues.

Although tuberculous and non tuberculous lymphadenitis are morphologically identical, the pattern is somewhat distinct from other causes of bacterial lymphadenitis.

Reactive: acute infection (e.g., bacterial, or viral), or chronic infections (tuberculous lymphadenitis, cat-scratch disease).

Scrofuloderma (also known as "Tuberculosis cutis colliquativa") is a skin condition caused by tuberculous involvement of the skin by direct extension, usually from underlying tuberculous lymphadenitis.

Tuberculous lymphadenitis (or tuberculous adenitis) is a chronic specific granulomatous inflammation of the lymph node with caseation necrosis, caused by infection with Mycobacterium tuberculosis or Mycobacterium bovis.

Tuberculous lymphadenitis is popularly known as Collar stud abscess, due to its proximity to the collar bone and superficial resemblance to a collar stud, although this is just one of the five stages of the disease.

There is good evidence from randomised-controlled trials to say that in tuberculous lymphadenitis and in TB of the spine, the six-month regimen is equivalent to the nine-month regimen; the US recommendation is therefore not supported by the evidence.