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Surgical Case Reports
Fig. 4 | Surgical Case Reports

Fig. 4

From: Rare metastatic pancreatic tumors from lung cancer with cystic changes resembling intraductal papillary mucinous neoplasm: a case report

Fig. 4

Histopathological findings of pancreatic tumors. a Macroscopic findings showed that the tumor comprised of a cystic wall and mural nodule, which contained cystic fluid. b Hematoxylin-eosin staining (× 40). Papillary tumors were growing in large cysts. Tumor cells had no mucus in the cytoplasm and had different characteristics from intraductal papillary mucinous neoplasm. The papillary structure was similar to that of the previously resected lung cancer tissue. c Hematoxylin-eosin staining (× 200) showed the power field of a. d Multiplex immunohistochemical staining (× 400), using specific antibody cocktails of TTF-1 and Napsin A. Nuclear expression of TTF-1 and granular cytoplasmic expression of Napsin A were seen. e CK7 was positive by immunohistochemical staining. f CK20 did not present significant staining

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