a retrospective study of 910 patients surviving at least five years after cervical irradiation for hodgkin 's disease , non-hodgkin 's lymphoma , or primary head an neck neoplasms showed the incidence of stroke following cervical irradiation was 63 of 910 patients ( 6.3 % ) during a mean period of observation of nine years .
C0027533
neck neoplasms
C0027530
cervical