Characteristics Cases Percentage
Sex
Male 20 64.5
Female 11 35.5
Age: years, median (range) 52 (25-73)
Karnofsky Performance Status: median (range) 80(60-90)
Pathologic types
Non-keratinizing 17 54.8
Squamous cell carcinoma 14 45.2
Previous EBRT frequency
Once 20 64.5
Two times 9 29.0
Three times 2 6.5
Total dose of previous EBRT: Median (Range) 71.9 (60-160)
Previous surgery
Yes 7 22.6
No 23 74.2
Not known 1 3.2
Previous chemotherapy
Yes 23 74.2
No 8 25.8
Previous molecular targeted therapy
Yes 7 22.6
No 24 77.4
Recurrent sites
In situ 14 45.2
Lymph node 17 54.8
Time from the initial EBRT to implantation: months, median (range) 19.6(2.1-113.3)