Malignant struma ovarii with papillary carcinoma combined with retroperitoneal lymph node metastasis: A case report

Figure 4 Surgically resected specimen of case. A: At low magnification, there are scattered follicular structures of different sizes and papillary structures (blue arrow) in some areas (hematoxylin-eosin staining, × 100); B: At high magnification, ovoid or round cells are seen to be poleally disordered, with enlarged and overlapping nuclei, which are transparent or ground glass like (black arrow) and irregular in shape, including nuclear sulcus (white arrow) and pseudoinclusion bodies (orange arrow) (hematoxylin-eosin staining, × 200); C: There is metastasis to the right retroperitoneum lymph node.