Pseudomelanosis intestini "from pylorus to jejunum:" A rare endoscopic finding in a patient with GI bleeding.

Pseudomelanosis of the gastrointestinal (GI) tract is a rare condition used to describe the accumulation of pigment deposits in the intestinal mucosa. Its underlying cause is not well understood. It has been described in association with gastrointestinal hemorrhage, chronic kidney disease, hypertension, diabetes mellitus, and medications such as hydralazine, ferrous sulfate, and furosemide.

Duodenal Pyloric Gland Adenoma in a 59-Year-Old Asian Male.

Pyloric gland adenomas (PGAs) are rare precancerous tumors typically arising from the stomach. Even more rarely do they arise in extragastric sites such as the duodenum and gallbladder. The identification of PGAs is important because they possess a risk of developing into invasive adenocarcinoma.