Scientific evidence for advisable excision margins for nonmelanotic @entity1489 is poorly documented. Recommended excision margins vary from 2 to 15 mm. A prospective study was performed on 150 @entity272 excised over a 9-month period in an outpatient facility at the authors' institution. Primary @entity272 were clinically diagnosed as either @entity1491 (nodular, superficial, infiltrating, or sclerosing) or @entity957 (well, moderately, or poorly differentiated). Macroscopic surgical excision margins were individually assessed, measured, and excised. Histopathologic analysis was then independently performed to determine the correct diagnosis and to measure the actual microscopic lateral and deep excision margins.Sixty-one percent of lesions were @entity1491 , 25 percent were @entity957 , and 15 percent were benign or premalignant. Diagnostic accuracy was 81 percent for basal cell and 59 percent for @entity957 . The average diameter of the @entity1491 was 12.1 mm; 47 percent of these lesions had a diameter of less than 10 mm. The average diameter of the @entity957 was 16.9 mm; 26 percent of these lesions had a diameter of less than 10 mm. The mean surgical margin was 4.2 mm (3.2 mm adjusted for shrinkage), whereas the mean microscopic lateral margin was 3.4 mm. Overall, complete excision was achieved for 98 percent of @entity1491 and 100 percent of @entity957 . The raw data were analyzed to assess the suitability of 1-, 2-, 3-, or 4-mm surgical excision margins. A 4-mm surgical margin would give a microscopic lateral margin beyond one microscopic high-power field (0.5 mm) in 96 percent of cases of @entity1491 and in 97 percent of cases of @entity957 . The authors recommend a 4-mm surgical margin as the optimal treatment for @entity272 clinically diagnosed as basal cell or @entity957 that are suitable for excision in an outpatient facility. Well-demarcated lesions, such as a @entity1491 , may be excised with a 3-mm margin.

Excision margins for nonmelanotic XXXX .

@entity1489 :: ('MESH:D012878', 'Disease') :: ['skin carcinoma'] @entity957 :: ('MESH:D002294', 'Disease') :: ['squamous cell carcinoma'] @entity1491 :: ('MESH:D002280', 'Disease') :: ['nodular basal cell carcinoma', 'basal cell carcinoma'] @entity272 :: ('MESH:D012871', 'Disease') :: ['nonmelanotic skin lesions', 'skin lesions']
@entity1489 :: (MESH:D012878,Disease) :: ['skin cancer']
