[Linear electronic intrarectal ultrasonography and XXXX . Results in 45 @entity1 ].

@entity1 @entity5 @entity189 @entity188
The aim of this study was to evaluate the preoperative staging of @entity189 by intrarectal ultrasonography using linear probe or curved array transducer. Between October 1991 and July 1993, preoperative staging with endoscopic ultrasound was performed in 45 @entity1 with @entity189 . Twenty-four received preoperative radiation therapy. For @entity189 of the middle and the lower part of rectum, the distance between the inferior pole of the @entity5 and the levator ani muscle was systematically measured. The ultrasound results were compared with histological and surgical findings. The staging was accurately predicted in 82.2% of cases. The depth of @entity5 invasion was correct in 93.3% (95.2% when preoperative radiation therapy was not applied and 79.1% after radiation therapy). Presence or absence of lymph nodes metastasis was correctly determined in 84.4% (90.5% when preoperative radiation therapy was not applied and 79.1% after radiation therapy). The distance between the inferior pole of the @entity5 and the levator ani muscle was correctly determined in 29/31 @entity189 of the middle and the lower part of rectum. While the linear and sectorial technique is more difficult when the @entity5 was circular, the staging of the lower part of @entity188 and anal canal was easier.
