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In page Complete circumferential peripheral and deep margin assessment:

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CCPDMA is subject to the basic principles of histology sectioning. From a physical standpoint, the true margin is never assessed because a thin face margin has to be cut through in order to make the slide for examination. Therefore, a true and complete assessment of all margins is never achieved. Serial sectioning allows CCPDMA approaches near-complete evaluation of the surgical margin and may be performed by pathologists, dermatologists, and surgeons.[citation needed]