Table 5 Post-treatment imaging of head and neck cancer beyond the first 3–6-month baseline imaging study. Percentage of recurrences detected with surveillance imaging only, percentage recurrences after 6 months, and time to recurrence

Ng 2019 [26]

Mixed

38

12.5

(1–160)

Gore 2019 [27]

Mixed

36

11.4

Jackowska 2018 [30]

Mixed

25.9

x

Kim 2017 [32]

Mixed

47

10

(2–32)

Kikuchi 2015 [33]

Mixed

67

15

7.9

(1.3–78)

Jung 2014 [34]

Mixed

23

x

Dunsky 2013 [35]

Mixed

20

64

9

(1–25)

Kim 2013 [36]

Mixed

86

33

11

(2–30)

Kostakoglu 2013 [37]

Mixed

84

50

6

(2.3–32)

Paidpally 2013 [39]

Mixed

21

Beswick 2012 [40]

Mixed

66

55

6

(2–43)

Abgral 2009 [41]

Mixed

30

x

10.7

(1.3–20)

Lee 2007 [42]

Mixed

26

55

Iovoli 2018 [29]

Mixed

50

x

Ho 2013 [43]

Mixed

6

x

12

Saussez 2007 [45]

Mixed

10

Average mixed

39.7

45.3

9.7

 Su 2018 [48]

Oropharynx

84

91

 You 2018 [49]

Oropharynx

52.9

 Corpman 2018 [50]

Oropharynx

48

15

(7–24)

 Kangelaris 2010 [51]

Oropharynx

50

15

(4–40)

Average OP

60.7

72.0

15.0

 Fukumoto 2021 [52]

Oral cavity

11.5

 Ravanelli 2021 [54]

Oral cavity

22

 Chi 2020 [55]

Oral cavity

29.4

 Lin 2017 [56]

Oral cavity

54

9.3

 Peisker 2017 [57]

Oral cavity

43.1

 Rivelli 2011 [58]

Oral cavity

16

21.7

(1–43)

 Krabbe 2009 [60]

Oral cavity

7.2

Average OC

32.9

12.4

 Marchi 2017 [62]

Hypopharynx/larynx

20

(8–60)

Average all together

40.9

52.0

11.5