Recurrence Terminology HN42-44

Question 1

Define the following tumours:

a) Simultaneous
b) Synchronous
c) Metachronous

Answer 1

o Simultaneous = Diagnosed at same time
o Synchronous tumor = found < 6 months later
o Metachronous tumor = found > 6 months later

Question 2

3 Criteria Defining a second primary

Answer 2

1) Different Histology
2) Different Location
3) Own Metastasis

Question 3

Incidence of 2nd Primary?

Answer 3

10%

Question 4

% of second primary tumours that are metachronous?

Answer 4

80%

Question 5

% appear in the first two years?

Answer 5

50% in first two years

Question 6

If patient continued smoking/drinking, what is the risk of:

1) Locoregional recurrence?
2) Second Primary

Answer 6

1) 40%

2) up to 40%