Which of the following is the preferred approach for evaluating a patient for colorectal cancer?

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Colonoscopy is the preferred approach for evaluating a patient for colorectal cancer.This approach permits tissue and brush biopsy to be performed.Staging of the patient is aided by endoscopic ultrasonography and computed tomography (CT)scanning.Surgical excision is the treatment of choice with lesions encroaching the distal 5 cm of the colon,resulting in colostomy.Radiation therapy is used for treatment of rectal and anal cancer.Chemotherapy is used when metastatic spread occurs.

Which of the Following Is the Preferred Approach for Evaluating