Primary Pericardial Mesothelioma, Which Was Veiled by a Pleural Empyema: A Case Report and Review

Figure 3

(a) Cell tight sections with core types and mitosis (HE color, 200-fold). (b) Immunohistochemistry with CAM 5.2 (cytokeratin 8/18), 100-fold, brown coloration = specific focal positivity. (c) Immunohistochemistry with calretinin, 100-fold, brown staining = diffuse positivity of tumor cells (typical marker for mesothelioma but may also be positive in other sarcomas and tumor entities). (d) Immunohistochemistry MIB-1, Ki67 equivalent, 100-fold, the brown cell nuclei mean positive reaction and indicate the proliferation index.

(a)

(b)

(c)

(d)