Figure 2. . . Skin biopsy specimens of a 53-year-old woman (case-patient 1) after fractionated CO2 laser resurfacing. A) Hematoxylin and eosin–stained and B) Ziehl-Neelsen acid-fast–stained sections show a tiny superficial microabscess surrounded by sparse granulomatous inflammation. Several groups of acid-fast organisms can be seen at the lower left of panel B. Original magnifications: 400× in A and 600× in B.