"In each, the radiologic features are not sensitive enough to confirm an absolute diagnosis. However, they do help to characterise the disease process. The gold standard investigation is upper GI endoscopy with duodenal biopsy."
"Associations have been made with other diseases. Dermatitis herpetiformis is associated with coeliac disease, especially when dietary control is not adhered to. Additionally, adenopathy and hyposplenism may be seen."