The Sectional Imaging Anatomy Of Rectum Lymphatic Drainage

objective:Continuous transverse abdominal pelvic and sagittal and coronal CT specimens, combined with abdominal and pelvic CT, MRI imaging continuous tomographic images and colorectal cancer patients, pathological data to study the distribution of the rectum and lymph nodes and lymphatic drainage tomography anatomy, as Imaging diagnosis and surgical treatment of colorectal cancer CT images provide anatomical basis. Materials and Method :Selection of adult male and female pelvic abdominal corpses in 10 specimens, first obtain CT and MRI images after conventional corrosion, and freezing mark, with an electric band saw faults into the legal system by the naked eye isometric abdominal pelvic lesions continuous transverse layer of specimens four cases. Sagittal CT specimens in 3 cases,3 cases of coronary CT specimens. 10 healthy volunteers using Philips 1.5T MRI scanner to obtain transverse, sagittal and coronal MRI images. 4 cases of male and female healthy volunteers using Philips Brilliance64 row spiral CT scanners enhanced scan, access transverse, sagittal, coronal CT images. Optional colorectal cancer patients CT 3 cases enhanced image looking colorectal cancer lymphatic metastasis. The continuous fault samples and CT, MRI image control study, patients with colorectal cancer in combination with CT, MRI images, clarify rectal anatomy lymphatic drainage characteristics.Based on the distribution and characteristics of the lymphatic drainage of the rectum lymphatic anatomy of the rectum is divided into 12 districts distributed nodes: the abdominal and pelvic and rectal size were modeled as two cylinders, each cylinder is divided into three sections up and down the first 5 disc above the upper section.Thea lower edge of the second sacral following is the next segment, between the two is in the middle. Around, each divided into four quadrants, the lymph nodes on the segment of large cylinders exist only in front quadrant. The para-aortic lymph nodes, mesenteric lymph nodes under the main section of the lymphatic drainage of the rectum. Big cylinder in the middle front quadrant of the common iliac lymph nodes. Left and right quadrants were left external iliac lymph nodes outside of the group above the lymph nodes.Lymph nodes inside the middle group of lymph nodes. After quadrant presacral lymph node. Mainly the middle of the lymphatic drainage of the rectum, the lower section around a large cylindrical quadrant is about superficial inguinal lymph nodes below the external iliac artery outside group. Obturator lymph nodes, the lower section of the main drainage of the rectum nearby lymph dentate line. Segment on a small section of the cylinder is inherent within the rectal fascia lymph nodes draining all four quadrants of each quadrant of the upper rectum lymphatic. Corresponding to the middle of the middle rectal fascia inherent in the lymph nodes, rectum small cylinder under the following paragraph that paragraph inherent fascia lymph nodesOn the first three vertebral transverse dimension to observe the classical level of the inferior mesenteric artery root node. The fifth disc in front of the sacral lymph nodes where the two middle groups. After the first sacral disc cross-sectional dimension can be seen above the external iliac lymph nodes medial, lateral and intermediate groups of lymph node. Cross-section through the third sacral Tai rotor component inherent in cross-section can be seen inside the rectum fascia lymph node. Sagittal next level through the observation group presacral lymph nodes on both sides of the rectum and classic fascia lymph nodes on both sides of the inherent level. Through the pubic symphysis was observed in parts of the coronal level superficial inguinal lymph nodes of the classic level. Through the front left and right parts of the coronal plane hip iliac lymph nodes can be seen by the left and right hip level to facilitate the observation of coronary obturator lymph nodes.T2WI with fat suppression superficial inguinal lymph nodes on both sides of the display there is a significant advantage, and for rectal lymph inherent fascia display insensitive. T1 WI show this group of lymph nodes have an advantage. Abdominal and pelvic CT scans rely mainly on enhanced scan, arterial phase images for easy identification the inferior mesenteric lymph nodes. Portal venous phase scanning is easy to observe the common iliac lymph nodes. Internal iliac lymph nodes and external iliac lymph nodes. Conclusion:1.A rectal draining lymph nodes distribution segment only the first quadrant abdominal and pelvic confined primarily lymph nodes draining the upper rectum and the lower section of the lymph nodes concentrated mainly in the lower section of the lymph nodes draining the rectum, and the front left and right quadrants are present, and the transfer of a great chance.2. In a cross-sectional basis under the duodenum to identify the root mesenteric lymph nodes. The use of the psoas muscle and lumbar body clearance looking for internal and external iliac lymph nodes. Rectum reference sacral vertebrae find inherent fascia lymph nodes. On the sagittal section L5-S1 disc use before the leading edge of looking for the top middle sacral lymph nodes. Referring to the coronal section of the pubic symphysis to find common iliac lymph nodes along the aorta, referring to the use of genital hip, obturator, obturator muscle, adductor magnus looking obturator lymph nodes.3. T2 WI with fat suppression superficial inguinal lymph nodes on both sides of the display there is a significant advantage, and for rectal lymph nodes display is not sensitive to the inherent fascia. Abdominal and pelvic CT scans rely mainly on enhanced scan. Arterial phase images for easy identification of the inferior mesenteric lymph node. Portal phase scanning is easy to observe the common iliac lymph nodes. Internal iliac lymph nodes and external iliac lymph node.