Case 163. Tuberculosis of skin (13 y-o M)

　 　 　 　
　 Biopsy from the neck skin, accompanying scarring fistula and nodal enlargement 　
　 　 　 　

　

 　 A few acid-fast bacilli are identified within the lesion (Ziehl-Neelsen). "Scrofuloderma" is a form of skin tuberculosis showing secondary fistulous extension from the lymph node or bone.