Cutaneous tuberculosis (lupus vulgaris-type)

Reddish plaque and nodules on a child's cheek

“…It may be useful in these paucibacillary forms. However, their sensitivity is medium, as is their specificity (possible false positives) 4 Direct examination with Ziehl Nilsson stain – Incorrect. Acid-fast bacilli are usually easy to find in early lesions but are rare once granulomas are developed.…”

“…It may be useful in these paucibacillary forms. However, their sensitivity is medium, as is their specificity (possible false positives) 4 …”