الفهرس 
Normal Anatomy of Colon and Rectum
Colorectal CarcinomaOnly 14 pages are availabe for public view
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Abstract
SUMMARY AND CONCLUSION
Colorectal cancer is a major cause of morbidity and mortality
throughout the world. It accounts for over 9% of all cancer incidences. It is
the third most common cancer worldwide and the fourth most common cause
of death. Imaging in colorectal cancer plays a crucial role in optimizing
radiotherapy target definition to avoid adjacent vital structures. The
modalities utilized for the evaluation of rectal carcinoma range from digital
rectal examination, X-rays, barium enemas, transrectal ultrasounds, and
colonoscopies. Due to the limitations of the above mentioned
techniques/procedures extent of intra-abdominal spread cannot be assessed.
Recently, few reports have shown that computed tomography (CT) staging in
rectal cancer is quite accurate in estimating the extent of disease and helpful
in planning the treatment of rectal cancer. CT is used for staging of rectal
carcinomas before treatment, staging recurrent disease, and for detecting the
presence of distant metastases after surgery.
Multidetector computed tomography (MDCT), an advancement of CT
technology, can acquire multiple simultaneous slices in a single breath-hold.
Its advantages include faster scanning time, better spatial resolution, lesser
motion artefacts and volume imaging. Volume imaging allows for the
acquisition of either thinner or thicker sections from the same raw data, thus
improving three-dimensional reconstructions and multiplanar reformation
capability. Therefore, we aim to assess the accuracy of MDCT in staging of
colorectal cancer. In the present prospective study, we included 30 patients
with pathologically proven colorectal cancer. All patients were from those
attending to Radio-diagnosis, Oncology & General Surgery Departments of
Tanta University Hospital. The mean age of the included patients was 49.1
±14.2 years, more than 60% of the patients were older than 50 years old. We