A pregnant woman suffering from a malignant brain glioma was
treated using the CyberKnife stereotactic radiosurgery system. A fetal
dose of (4.2 ± 0.1) cGy was measured using the RANDO phantom.
A corresponding dose of (3.2 ± 0.3) cGy was also calculated based
on results obtained using EBT3 films situated upon the patient’s skin.
The fetal dose results lie safely below the threshold value of 10 cGy
for congenital malformations and mental and growth retardation.
An increase of the childhood cancer risk by 0.3% was estimated using
the higher fetal dose value. The treatment was administered successfully,
allowing the patient to deliver a healthy child. At the age
of 18 months the child enjoys excellent health with no signs of
growth retardation or cognitive impairment.