Jejun Health Dictionary

Jejun: From 1 Different Sources

(jejuno-) combining form denoting the jejunum.

Health Source: Oxford | Concise Colour Medical Dictionary
Author: Jonathan Law, Elizabeth Martin

Jejunum

Part of the small INTESTINE.... jejunum

Jejunal Biopsy

A diagnostic test in which a small piece of tissue is removed from the lining of the jejunum for microscopic examination.

It is especially useful in the diagnosis of Crohn’s disease, coeliac disease, lymphoma, and other causes of malabsorption.

The biopsy is taken using an endoscope passed down the throat into the small intestine, via the stomach.... jejunal biopsy

Jejunal Ulcer

see peptic ulcer; Zollinger-Ellison syndrome.... jejunal ulcer

Jejunectomy

n. surgical removal of part or the entirety of the jejunum.... jejunectomy

n. an operation in which part of the jejunum is joined to the distal ileum following the removal or bypass of diseased segments of small bowel. It was formerly used for the treatment of obesity but has been abandoned because of deleterious side-effects.... jejunoileostomy

Jejunostomy

n. a surgical operation in which the jejunum is brought through the abdominal wall as a *stoma. It may enable the insertion of a jejunal catheter for short-term infusion of nutrients or other substances. A feeding jejunostomy is a tube inserted into the jejunum using endoscopic or surgical techniques to allow the introduction of nutrients. This may be required when disease, previous surgery, or refractory vomiting prevents the placement of a *gastrostomy (PEG) tube. A percutaneous endoscopic gastrojejunostomy (PEG-J) is a jejunal extension that is applied to an existing PEG tube.... jejunostomy