Figure 2: (a) Low power light microscopy of the endoscopic biopsy with predominant basaloid appearance and invasive pattern (Hematoxylineosin stain. original magnification 4x). (b) High power showing neural-type rosettes with secretion into the lumen (Hematoxylin-eosin stain. original magnification 40x). (c) The surgical resection large lobules with compact nests of basaloid cells and jig saw-like pattern, necrosis, prominent interstitial and pericellular hyalinosis and peripheral palisading (Hematoxylin-eosin stain. original magnification 4x). (d) Detail of scanty squamous cell component (Hematoxylin-eosin stain. original magnification 40x).