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. 2020 Feb 27;6:44. doi: 10.1186/s40792-020-00809-w

Fig. 2.

Fig. 2

The specimens by endoscopic ultrasound sonography-guided fine needle aspiration biopsy (EUS-FNAB) using a hematoxylin-eosin staining (× 400) and b immunohistochemical staining for S-100 protein (× 400)