Figure 4.

(a) Pre-treatment image of an abscess viewed along the long axis of the abscess. (b) Post treatment image viewed in a short-axis plane, orthogonal to the image plane in (a). Bubbles outline the focal regions from BH and CH treatments. (c) Masson’s trichrome stained section of the abscess in the short-axis plane. Collagen-rich connective tissue stains blue; nuclei stains black; muscle, cytoplasm and keratin pink-red. The abscess is surrounded by a collagen-rich capsule. The center of the abscess contains cells, tissue fragments and protein which appears pink at a low magnification. Yellow dashed or dotted line indicate the main border of the BH or CH lesion, respectively. Scale bar represents 1 cm.