Fig. 2

(a) Merkel cell carcinoma excisional biopsy with a suture wire in the superior margin. (b) To prevent loss of anatomical orientation and to ensure accurate margin analysis after histological processing, the margins were stained in green and blue (c) Sequential sections, perpendicular to its longest axis every 2–4 mm. The fragment in the upper left corner corresponds to the superior margin, and the fragment in the lower right corner corresponds to the inferior margin. Both should be identified in separate cassettes and referred to in the gross report for microscopic orientation