Duodenal Neuroendocrine Tumour Presenting as GABA B Receptor Autoimmune Encephalitis

Figure 1

(a) Ga68DOTA-NOC—5 × 4 × 5 cm well defined DOTA avid heterogeneously intensely enhancing mass lesion in the right sub-hepatic region, abutting the proximal lateral wall of D2 segment of duodenum, situated posterior to hepatic flexure of colon s/o NET, (b) H & E Stain, (c) CT guided biopsy—Ribbons of small oval cells seperated by vascular channels. Cells have eosinophilic granular cytoplasm and relatively large dark nucleus. Cells and nuclei are uniform in size. No mitosis seen. Focal necrosis seen. Lower row images show positive stains by immunohistochemistry in our patient, (d) Synaptophysin, (e) Chromogranin, (f) CD56, and (g) Neuron specific enolase.

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