Incomplete excision of basal cell carcinoma: a prospective multicentre audit

Summary The audit of incomplete excision of basal cell carcinoma can be used as a parameter for clinical governancein plastic surgery units. However, there are no national standards, and all the previous reports from the UK have been retrospective and from regional units only. This 1 year prospective audit was undertaken simultaneously in the plastic surgery units of three different categories of hospital: a regional plastic surgery unit (University Hospital of South Manchester), a supraregional cancer hospital (Christie Hospital) and a district general hospital (Royal Bolton Hospital). A total of 757 lesions were excised from 600 patients, with 34 lesions (4.5%) being incompletely excised. The incidences of incomplete excision were similar in the regional unit (3.2%) and the district general hospital (3.1%), but higher in the supraregional cancer hospital (7.5%). The commonest site for incomplete excision was the eyebrow, followed by the postauricular area, the nose and the temple. There were no statistically significant differences in the distributions of the age and sex of the patients, the site and size of the lesions or the methods of repair between the three hospitals. However, there were significant differences in the distribution of syndromal, multiple and recurrent lesions, the grade of surgeon, and the clinical and histological subtypes. When the various confounding factors were adjusted by logistic regression, the variables most likely to have affected the incidence of incomplete excision were found to be grade of surgeon, minimal excision margin and histological subtype.