A Rare Case of a Primary Squamous Cell Carcinoma of the Stomach Presenting as a Submucosal Mass

Figure 4

Tumor cells showing strong coexpression of p63 (nuclear stain, brown) and cytokeratin 5/6 (membrane stain, red) (a) and negative expression of p16 (b), CD117 (c), and CK7 (d).

(a)

(b)

(c)

(d)