Posts Tagged ‘Cancer’

Although the cause and pathogenesis of adenocarcinoma are similar throughout the large bowel, colon cancer, significant differences in the use of diagnostic and therapeutic modalities separate colonic from rectal cancers. This distinction is largely due to the confinement of the rectum by the bony pelvis. The limited mobility of the rectum allows MRI to generate better images and increases its sensitivity. In addition, the proximity of the rectum to the anus permits easy access of ultrasound probes for more accurate assessment of the extent of penetration of the bowel wall and the involvement of adjacent lymph nodes. The limited accessibility of the rectum, the proximity to the anal sphincter, and the close association with the autonomic nerves supplying the bladder and genitalia require special and unique consideration when planning treatment for cancer of the rectum.

Melanoma could spread rapidly and create large malignant tumors in the lung, brain, liver, or other organs. Sometimes melanoma that has extended to another organ is confused with primary cancer of that organ. Primary cancer is cancer that begun in that organ. Melanoma that has extended to other areas of the body might not be detectable until long after the original melanoma was removed from the skin.

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