The primary objectives of this study are to assess, using Mohs micrographic surgery (MMS) at
the end of treatment, the efficacy (primary) and safety (secondary) of vismodegib compared to
placebo in the oral adjunctive pre surgical treatment of basal cell carcinoma. A secondary
objective is to assess how often and in what types of lesions does pre surgical treatment
with vismodegib result in complete eradication of the tumor.