preoperative irradiation of 5,000 rad in 5 weeks before total laryngectomy with radical neck dissection was compared for two groups of patients : ( 1 ) those treated to a smaller volume through lateral opposed fields ( 37 patients ) and ( 2 ) those treated to a larger volume by adding a third field directed to the lower neck and supraclavicular fossae ( 46 patients ) .
C0034542
radical neck dissection
C0027530
neck