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Immunohistochemical findings for D2-40. A. Case 14 showing strong intensity (×400). B. Case 4 showing moderate intensity. Note immunopositive lymphatic vessels with strong intensity (×400). C. Case 8 showing no staining of tumor cells. Note immunopositive lymphatic vessels present outside the tumor area (left half of the field) (×400). D. Case 7 showing microcystic structures, with the tumor cells lining them moderately immunostained (x400).
