RT Journal Article SR Electronic T1 Unusual case of adult familial Menetrier disease in siblings JF BMJ Case Reports JO BMJ Case Reports FD BMJ Publishing Group Ltd SP e231175 DO 10.1136/bcr-2019-231175 VO 12 IS 10 A1 Emily Brownson A1 Adrian J Stanley A1 Prakash Konanahalli A1 John P Seenan YR 2019 UL http://casereports.bmj.com/content/12/10/e231175.abstract AB Menetrier disease is a rare disease characterised by hyperplasia of the gastric epithelium and large gastric folds. We present a case of a 58-year-old woman who was referred with iron deficiency anaemia, with a family history of a sibling who had undergone gastrectomy for presumed gastric malignancy. Endoscopy showed prominent gastric mucosal folds and biopsies showed hyperplastic gastric mucosa, with prominent foveolar hyperplasia suggestive of Menetrier disease. Further information about her brother’s diagnosis was sought, and it was found that his pathology after gastrectomy showed diffuse glandular hyperplasia also in keeping with Menetrier disease. Adult familial Menetrier disease has so far been a rarity in the literature—review elicits five previous cases of this presentation in siblings.