The few previous studies on recurrence of incompletely excised basal cell carcinoma are retrospective, and the reported recurrence rate ranges from 19% to 67%. In a prospective study design, wer found a recurrence rate of 41% and 34 surgically excised positive-margin basal cell carcinomas. The mean time until tumor recurrence was 24.6 months. The mean follow-up time in those patients remaining free of tumor was 61.4 months.
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Silva et al. (1985) studied this question.
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