Morhea-form basal cell carcinomas of the canthi.

Basal cell carcinoma is not a single entity, but a lesion of protean morphology. In treating basal cell carcinomas, treatment should be correlated with the histopathology of the tumor. Attention has been called to the aggressive infiltrating properties of morphea-form lesions. Morphea-form basal cell carcinomas should not be treated with radiotherapy. Surgery with frozen section control is advocated as the treatment of choice and the value of permanent sections has been stressed. Large defects should be covered with a skin graft.