“help, de richtlijn laat me in de steek!” radiotherapieresearch.nki.nl/amaros/symposium...

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Help, de Help, de richtlijn richtlijn laat laat me in de me in de steek steek ! ! radiotherapie radiotherapie Nederlands Kanker Instituut/ Antoni van Leeuwenhoek Amsterdam Paula Elkhuizen 28 oktober 2009

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““Help, de Help, de richtlijnrichtlijn

laatlaat

me in de me in de steeksteek!!”” radiotherapieradiotherapie

Nederlands Kanker Instituut/Antoni

van Leeuwenhoek

Amsterdam

Paula Elkhuizen28 oktober

2009

Radiotherapie issues

Boost-

no

boost?

Whole

breast

/partial

breast

Post mastectomie RT

RT na neoadjuvante

chemotherapie;

Relatie

Locale controle-Overall Survival

prevention

of 4 LR’s prevents

1 cancer

death

Radiotherapie issues

Boost-

no

boost?

Whole

breast

/partial

breast

Post mastectomie RT

RT na neoadjuvante

chemotherapie;

Dose

Response for

local

control

after

WLE and RT

Bentzen IJROBP 2004

4 % gain

in LC

0

10

20

30

40

50

0 1 2 3 4 5 6 7 8 9 10

Age < 40 (n=448)

0

10

20

30

40

50

0 1 2 3 4 5 6 7 8 9 10

Age 41-50 (n=1334)

0

10

20

30

40

50

0 1 2 3 4 5 6 7 8 9 10

Age 51-60 yr (n=1801)

0

10

20

30

40

50

0 1 2 3 4 5 6 7 8 9 10

Age > 60 yr (n=1734)

P=0.0019 P=0.0096

P=0.0012 P=0.029

Local failure by age: Boost versus No Boost

Bartelink 2007 JCO

standard treatmentadditional treatment

CBO-richtlijn

Een boost naast radiotherapie van de gehele mamma verbetert de locale controle in alle patiënten.

Het absolute voordeel van een ‘boost' na complete resectie neemt af met de leeftijd van patiënte.

Niveau 1: A1 Bartelink 2001, Bartelink 2007

In de praktijk

Afspraak boost tot bepaalde leeftijd

Benefit/ cost; fibrose, dosis mamma, hart, longen

Indicatie boost obv

andere (risico)-factoren:–

Snijranden

Gradering–

LVI

DCIS–

Co-morbiditeit

Radiotherapie issues

Boost-

no

boost?

Whole

breast

/partial

breast

Uitbreiding post mastectomie RT

RT na neoadjuvante

chemotherapie;

Partial breast irradiation (PBI): rationale•

Most recurrences after BCT close to the tumor: 70-80%

Vicini

et al 2007

5 -

10 yrs LR rates 1.6% -

3.8%

Polgar

et al 2007; fase IIIWBI or PBI (n=285)5 yrs LR rates 3.4% and 4.7% ns

Many randomised

studies are running•

Low risk patients; (>50-60 jr, negative margins etc)

NL:–

IRMA trial; (PBI (3dCRT) vs whole

breast

RT)–

PAPBI trial; neoadjuvant

RT

Radiotherapie issues

Boost-

no

boost?

Whole

breast

/partial

breast

Post mastectomie RT

RT na neoadjuvante

chemotherapie;

Post-mastectomie indicatiesRT indien high risk:

cT4 en/of cN3–

Irradicaliteit

pN

4+

RT bij intermediate

risk?–

N1-3

pN0 met risicofactoren•

Leeftijd < 40 jaar

Lymfangioinvasie•

Graad III

pN0 pN1-3 pN4+

Local

Recurrence;

EBCTCG data; Mastectomy

+ AC (axillary clearance) with(out) RTunpublished results

pN0 pN1-3 pN4+

All Cause

mortality;

Mastectomy

+ AC (axillary clearance) with(out) RTEBCTCG data

unpublished results

SUPREMO (BIG 2-04 EORTC 22051-10052 BOOG 2006-03)

Selective Use of Postoperative Radiotherapy aftEr MastectOmy

Stage II breast cancer after mastectomypT1-2 N1 M0

pT2 N0 M0 gr III or LVIR

Chest wall radiotherapy (50 Gy)

No chest wall radiotherapy

Main end-point:

Overall survival

Presentator
Presentatienotities
International consensus supports routine use of PMRT in T3 tumours or 4 or more involved auxiliary nodes (or 20% or greater risk of loco regional recurrence, LRR, at 10 years). Role of chest wall RT in women with 1-3 involved nodes (<15% risk of LRR at 10 years) is uncertain. Oxford overview (2000) suggests PMRT reduces breast cancer mortality in women with 20% 10 year risk of LRR by 5%. Danish and Canadian trials show 9 – 10% survival advantage from addition of comprehensive loco-regional RT to systemic therapy. Danish trial showed 8% gain in 10 year overall survival (62% vs. 54%) in 1-3 N+ group. However, surgery of the axilla inadequate in Danish trial (mean 7 nodes) generalisability of findings unclear. Systemic therapy changed from CMF to anthracycline containing required for ‘intermediate risk’ group.

Radiotherapie issues

Boost-

no

boost?

Whole

breast

/partial

breast

Post mastectomie RT

Neoadjuvante

chemotherapie;

RT na neoadjuvante

chemotherapie‘standaard’

RT indicaties gebaseerd op postop informatie

RT indicatie obv

pre-chemo

cTNM–

pre-chemo

RT consult–

N status•

axillair: pre-chemo

SN•

cN+; periclav

N+?

RT indicatie obv

post-chemo

info –

Histologie veranderd •

Gradering•

LVI–

N status

Downstaging

invloed op RT indicatie?

RT na neoadjuvant

chemotherapie

In de praktijk:•

MSO–

kliergebieden?

Postmastectomie:–

High risk T3-4N+; •

RT ongeacht respons

Intermediate

risk….?•

cT1-2N1

RT na neoadjuvant

chemotherapie

Door onvoldoende info pre-chemo, En ‘veranderde’

info post-chemo

RT Indicatie?–

overbehandeling

onderbehandeling

Intermediate

risk cT1-2N1•

Neo

SUPREMO

NL studie voorstel (Boersma, Elkhuizen, Voogd)–

richtlijn bij neoadj

CT

Registratie studie

Radiotherapie issues

Boost-

no

boost?

Whole

breast

/partial

breast

Post mastectomie RT

Neoadjuvante

chemotherapie;

RT Indicatie