Table 1.

Modified Radiation Therapy Oncology Group grading criteria

	Acute genitourinary	Acute gastrointestinal
Grade 1	Requiring no medication	Requiring no medication
Grade 2	Frequency of urination or nocturia less frequent than every hour, dysuria, urgency, bladder spasm requiring local anesthetic	Diarrhea requiring parasympatholytic drugs; mucous discharge not necessitating sanitary pads; rectal or abdominal pain requiring narcotic analgesics
Grade 3	Frequency with urgency and nocturia hourly or more frequently, dysuria, pelvis pain, or bladder spasm requiring frequent narcotic; gross hematuria with or without clot formation	Diarrhea requiring parenteral support; severe mucous or blood discharge necessitating sanitary pads; abdominal distension
Grade 4	Hematuria requiring transfusion; acute bladder obstruction not secondary to clot passage, ulceration, or necrosis	Acutre or subacute obstruction, fistula or perforation; gastrointestinal bleeding requiring transfusion; abdominal pain or tenesmus requiring tube decompression or bowel diversion