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S-58
Testicular cancer (TC) as an illustrative paradigm
S.D. Fosså
Rikshospitalet - Radiumhospitalet Medical Center, Oslo,
Norway
With a 35 year median age at diagnosis and a >90% cure
rate after multi-modal treatment, TC survivors represent an
excellent cohort for the illustration of late effects and
survivorship problems experienced not only by themselves,
but by cancer survivors in general.
The most serious
late effect is the steadily increasing relative risk (RR) of a
second malignancy (for solid cancer: radiotherapy alone
[RR: 2.0]; chemotherapy alone [RR: 1.8]; combination
treatment [RR: 2.9]), the youngest patients displaying the
highest risk.
Typically these second solid malignancies
develop after a delay of >10 years, when the patient no
longer is regularly seen by the oncologist. During recent
years increasing evidence has emerged that modern
treatment of TC (cisplatin-based chemotherapy, infradiaphragmatic
radiotherapy) implies an increased risk of
cardiovascular disorders (CVD), evidenced by biochemical
parameters, premature development of myocardial infarction
and/or increased mortality due to CVD.
Again the
youngest patients display the greatest risk. Abdominal
radiotherapy also leads to increased mortality due to benign
gastrointestinal conditions.
Approximately 20% of longterm
TC survivors complain about peripheral sensoric
neurotoxicity and/or ototoxicity. Germ line GSTP1 polymorphisms
seem to be associated with individual sensitivity for cisplatin-induced neuro- and ototoxicity.
At least
70% of TC survivors who attempt post-treatment paternity
are successful, in dependency from the intensity of
treatment, for most patients without the use of cryopreserved
semen.
Though both libido and ejaculation may be
reduced in TC survivors, they are at least similarily
satisfied with their sexuality as the general population.
TC
survivors` post-treatment quality of life (Qol) is comparable
to that of the general population, though fatigue
(prevalence: 17%) and anxiety (19%) are seen more often
than in controls.
Conclusion: After 3 decades of large
international randomized trials TC patients can now be
treated with minimal treatment without reduction of cure
and taking into account the individual patient`s preferences.
Before treatment TC patients should be informed
about the prospective of good Qol in spite of some
unavoidable side effects in some of them. Life-style
changes and regular life-long controls by the community
health care service may be necessary to prevent CVD based
on an individual survivor care plan, to be given to the
patient when he discontinues oncological care.
The
increased risk of second cancer should not be overlooked.
These conclusions are probably also relevant for other
survivors after adult-onset cancer diagnosed at young age.
MASCC, 2007
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