Secondary Resistance to Vismodegib After Initial Successful Treatment of Extensive Recurrent Periocular Basal Cell Carcinoma with Orbital Invasion

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Abstract

Vismodegib is proven to be effective in the treatment of locally advanced and metastatic basal cell carcinoma, but evidence of resistance is beginning to emerge. A case of advanced recurrent periocular basal cell carcinoma which responded dramatically to vismodegib after 3 months but recurred after 9 months due to drug resistance, eventually requiring orbital exenteration, is presented. The mechanism of vismodegib resistance is discussed.

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