Multiple endocrine neoplasia type 1 combined with thyroid neoplasm: A case report and review of literatures

Figure 4 Histopathological examinations. A: Parathyroid cyst: a single locular cystic mass covered by a single layer of flattened transparent cells with small clusters of extruded parathyroid tissue in the wall; B: Thyroid papillary carcinoma: complex branching papilla with fibrous vascular center, and surface coated with simple columnar epithelium. The epithelial nuclei were ground-glass like, with nuclear grooves, intranuclear pseudo-inclusions, and nuclear overlap; C: Nodular goiter: the follicles vary in size and are filled with colloid; D: Metastatic lesions of thyroid papillary carcinoma in lymph nodes. Hematoxylin and eosin staining, 100× magnification.