A Case of Myoepithelial Hamartoma: Morphological Variation Supported by OCT4 Expression

Figure 5

Histological findings. Organoid structure composed of large ducts surrounded by radially extending acini and small ducts resembling Brunner or pyloric glands (hematoxylin and eosin staining: HE (a)). Immunohistochemical study shows that MUC5AC is negative (b), whereas MUC6 is positive (c). Acinar cells are positive for trypsin (d).

(a)

(b)

(c)

(d)