By "peptic" your question centers on diseases of the stomach of which there are many.
These can be categorized as: problems with inflammation
(e.g. Ulcers), with infection (e.g. H.Pylori or parasites
), with motility (examples: gastroparesis
, gastric outlet obstruction), with secretion (hyper or hypo-acidity), infiltrative (lymphoma
), blood flow (gastropathies), functional dyspepsias, etc.