PMC4344977_01
GCT was observed strongly positive with S-100 (x100)
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F2
While a diffuse and full-layered positive staining with Ki-67 is present on epithelium of atypical squamous islands (red arrow), a limited staining is present on basal-parabasal layers of non-neoplastic epithelium (black arrow) (Ki-67, x200)
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F3
The Ki-67 proliferation index was 1% in GCT, although nuclear positive staining was observed on all epithelial thickness of in situ and invasive foci of squamous cell carcinoma (Fig. 3).
While a diffuse and strong positive staining with p63 is present on atypical squamous islands (red arrow), a limited staining is present on basal-parabasal layers of non-neoplastic epithelium (black arrow) (p63, x200)
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F4
During immunohistochemical evaluation of squamous cell carcinoma using P63, a similar staining pattern was observed with Ki-67 (Fig.4). 
Re-excised mass in a diamond shape
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F5
The tumor was re-excised; leaving a surgical safety margin of 1 cm from all directions to the previous surgical area (Fig.5).