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(A) Clinical photograph of case, showing perioral pigmentary lesions. (B) Duodenal polyp of patient 1 showing fronds with prominent branching covered by well differentiated gastric and duodenal epithelium (haematoxylin and eosin (H&E), low power). (C) Same polyp showing prominent bundles of smooth muscle fibres in the stromal cores (H&E, medium power).
