Figure 15.

(a) Different image plane from abscess in Fig. 8. A darkened region extending from the abscess upwards at an angle may be due to the needle used to aspirate contents before and after treatment. (b) Masson’s trichrome stained section from the same abscess from 3 weeks after treatment shows a similar track. The track may be from the needle aspiration, indicating a potential track for bacteria to escape the abscess. Alternatively, the track may be a naturally formed fistula. Scale bars represent 1 cm.