<prompt> What is cutaneous Tuberculosis secondary to underlying tissue lymph node calledScrofulodermaLupus vulgarisSpina ventosaNone of the above  <response>: Cutaneous Tuberculosis Scrofuloderma:- It is a result of contiguous spread of infection to skin from underlying disease usually cervical lymph nodes and bones; fluctuant nodules that develop sinus tracts, draining to skin, with tethered appearance. Ref:- Review of Dermatology by Alikhan; pg num:-302 