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The purpose of a colonoscopy is to provide a visual diagnosis via inspection of the internal lining of the colon wall, which may include identifying issues such as ulceration or precancerous polyps, and to enable the opportunity for biopsy or the removal of suspected colorectal cancer lesions. [4] [5]
When cancer is more advanced and polypectomy is not possible surgical resection is necessary. Using imaging and pathologic evaluation of resected tissue the tumor may be staged using AJCC stages. [9] Surgical resection of tumors for staging and for curative purposes requires removal of local blood vessel and lymph nodes.
Colonic polypectomy is the removal of colorectal polyps in order to prevent them from turning cancerous. Method of removing a polyp with a snare. Gastrointestinal polyps can be removed endoscopically through colonoscopy or esophagogastroduodenoscopy, or surgically if the polyp is too large to be removed endoscopically.
An incisional biopsy or core biopsy samples a portion of the abnormal tissue without attempting to remove the entire lesion or tumor. When a sample of tissue or fluid is removed with a needle in such a way that cells are removed without preserving the histological architecture of the tissue cells, the procedure is called a needle aspiration ...
Endoscopic submucosal dissection (ESD) is an advanced surgical procedure using endoscopy to remove gastrointestinal tumors that have not entered the muscle layer. ESD may be done in the esophagus, stomach or colon. Application of endoscopic resection (ER) to gastrointestinal (GI) neoplasms is limited to lesions with no risk of nodal metastasis.
4. Colectomy: The removal of the colon (large intestine) whole or in part. This procedure is typically done to address problems including colorectal cancer, diverticular disease, or inflammatory bowel disease. 5. Resection of the liver in part: This procedure is frequently carried out to treat liver tumors or to remove damaged liver tissue. 6.
Colectomy as treatment for colorectal cancer also includes lymphadenectomy, or removal of surrounding lymph nodes, which may be done for staging of the cancer or removal of cancerous nodes. [11] More extensive lymphadenectomy is sometimes accomplished by the removal of the mesocolon , the fatty tissue adjacent to the colon, which contains blood ...
Removal of coronary artery obstruction and insertion of stent(s) ( 36.1 ) Bypass anastomosis for heart revascularization ( 36.2 ) Heart revascularization by arterial implant