Standards-of-service-provision-bowel-cancer-patients-dec13

3.15 The use of endo-rectal ultrasound is optional for radiologic staging of rectal cancer, but is inadequate for determining circumferential margins. 3.16 Positron emission tomography and CT scanning (PET-CT) is reserved for patients where there is diagnostic uncertainty about likely recurrent or potentially resectable metastatic disease. ................
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