Abstract:
The aim of this study was to characterize the rectal neoplasms by the computerized tomography and sigmoidoscopy in patients who have suspected colorectal neoplasms.
It was conducted at radiology and endoscopy departments in Soba hospital. This study was expanded from October 2011 up to December 2011, fifty patients were studied (34 male , 16 female , mean age : 52.5 y , range : 25 – 85 y).
All patients underwent to sigmoidoscopy and CT. The most common site of rectal neoplasms were detected by the CT is a lower third of rectum. CT also has a benefit of determining the invasion of the masses to surroundings.
The sigmoidoscope has a great benefits in determining the distance from the anal verge at which the masses are detected, the majority of lesions were found at 8 – 15 cm from the anal verge, also by the same method the nature of the mass is identified, most masses are circumferential mass.
The biopsies are taken from all patients who has rectal lesions by the sigmoidoscope and sent to histopathological examination that classified the most masses as Moderately differentiated adenocarcinoma.
When comparing the CT findings and biopsy result, finings , the study showed that 46 cases were true positive in biopsy and CT, where the CT failed to diagnose 4 cases, therefore the CT has an accuracy of 46.1% and sensitivity of 92 %.
It can be said that the two image modalities were performed together and used as essential methods in diagnosing of rectal neoplasms in addition to histopathological examination as effective tool in determining the possibility of malignancy of this detected
