This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Mycobacterial Infections, Subject name: Dental
The lesion seen involving neck of this 31 year old female is most likely to be? 
Select and explain. 
A. Epitheliomatous ulcer, B. Malignant cutanous ulcer, C. Syphilytic ulcer, D. Tuberculous ulcer
D: Tuberculous ulcer
Answer: D: Tuberculous ulcer 
Explanation: 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