MedGen

The term peptic ulcer refers to acid peptic injury of the digestive tract, resulting in mucosal break reaching the submucosa. Peptic ulcers are usually located in the stomach or proximal duodenum, but they can also be found in the esophagus or Meckel's diverticulum. Infection with Helicobacter pylori and the use of non steroidal antiinflammatory drugs (NSAIDs) or aspirin are the main risk factors of both gastric and duodenal peptic ulcers. [from HPO]

A circumscribed inflammatory and often suppurating lesion on the skin or an internal mucous surface resulting in necrosis of tissue. [from NCI]

Mantle cell lymphoma is a rare form of malignant non-Hodgkin lymphoma (see this term) affecting B lymphocytes in the lymph nodes in a region called the ``mantle zone''. [from ORDO]

Meningitis in which lymphocytes predominate in the cerebrospinal fluid. [from NCI]

Pathological conditions in the duodenum region of the small intestine (intestine, small). [from MONDO]