الفهرس 
Introduction and Aim of the WorkOnly 14 pages are availabe for public view
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Abstract
The gastrointestinal tract (GIT) consists of a hollow muscular tube starting from the oral cavity, pharynx, esophagus, stomach and intestines to the rectum and anus.
Gastrointestinal tract is the most common extranodal lymphoma and is almost exclusively of non-Hodgkin type.
In the gastrointestinal tract, lymphoid elements occur in the lamina propria and submucosa. Either primary or secondary lymphomatous neoplasms may occur in any portion of the gastrointestinal tract
MDCT is a potentially powerful tool for noninvasive evaluation of the gastrointestinal tract.
MDCT is the diagnostic imaging choice because it is helpful in early detection, evaluation and characterization of the gastrointestinal lesions. The sagittal and coronal reformate as well as 3-D images give excellent structural detail which help in understanding the spatial relations to adequately stage and for preoperative and pre chemo-therapy planning.
The study included MDCT of the gastrointestinal tract for 27 patients were pathologically proved to have gastrointestinal lymphoma at the period from January 2013 to September 2013. The twenty seven patients included 13 males and 14 females ranging in age from 5 to 70 years with the mean age at the fourth decade of life.
All MDCT exams applied to the patients were in supine position after oral contrast as well as intravenous nonionic contrast injection. Axial CT images were obtained and transferred to a workstation and to get multiplanar reconstructed images as well as 3D volume rendered images.
In our study we found that the primary gastrointestinal NHL is more common that the secondary one.
The most commonly involved organs (in decreasing order of frequency) are the stomach, small bowel, large bowel, and esophagus.
MDCT findings include mild to moderate circumferential wall thickening. Luminal constriction also may be observed. Lesions may be solitary or multiple and are usually homogeneous and hypo- or isoattenuating in relation to the attenuation of the normal bowel. Mild to moderate enhancement is noted. Lymphadenopathy is usually present, and that finding aids in the diagnosis of lymphoma.
MDCT is the standard technique for evaluation and staging of the gastrointestinal lymphoma.