Figure 4. Photomicrographs of endoscopic ultrasound (EUS)-guided fine-needle aspiration biopsy (FNA) of the pancreas mass (400 x magnification) arrow indicates neuroendocrine component and the remaining cells are UCOGC component; A – Synaptophysin immunostain; B – SMAD4 immunostain; C – CD56 immunostain; D – CA19-9 immunostain.
