The lesion seen involving neck of this 31 year old female is most likely to be?

Locally there will be regional lymphadenopathy where the lymph nodes may be matted. In late stages, a cold abscess-Painless, fluctuant mass, not warm; significantly, there are no signs of inflammation.This is a clinical manifestation of underlying caseation. Left untreated, the cold abscess initially deep to the deep fascia now bursts through into the space just beneath the superficial fascia. This produces a bilocular mass with cross fluctuation- 'collar-stud' abscess. Eventually, this may burst through the skin discharging pus and forming a tuberculous sinus. The latter typically has watery discharge with undermined edges