Metastatic Squamous Cell Carcinoma of the Anus to the Lung Confirmed with Allelotyping
Figure 1
Hematoxylin and eosin staining on anal fissure excision at 5x magnification (a) and 20x magnification (b). Immunohistochemical staining for p16 (c) and CISH for HPV-16 (d) were both positive.
