The solitary keratoacanthoma, is a common cutaneous neoplasia. of low malignancy with the potential to develop an invasive squamous cell carcinoma. K.A. usually appears on sun-exposed areas in patients of middle age or older. Six cases are presented. The patients' ages ranged from 56 to 94. Two of them were male and four, female. The evolution of the lesions was from 2 to 18 months. The location was in different parts of the body, especially on the face.
A combination of radiofrequency and cryotherapy was used while a large safety margin from 4 to 6 mm was observed. No recurrences were observed. We recommend this technique because it is a useful, effective and cheap method that can be applied in old patients and it could be repeated if it were necessary. Moreover, it is an ambulatory technique.