Fig. 5

Immunohistochemical staining. Immunohistochemical staining of ventral mural nodule was a positive for CD31 (original magnification × 40) and b negative for αSMA and c MDM2 (original magnification × 200). d The Ki-67 labeling index was 19.0% (original magnification × 200). e Immunohistochemical staining of the thickened portion of the cyst wall was positive for αSMA (original magnification × 200)