在最近的Lancet oncology 裡面, 針對攝護腺癌骨盆腔淋巴結是否需要照射有一篇整理的非常完整的review, 剛好我晨會也會報告這篇, 這裡來做個整理, 總共有四個臨床情境, 會考慮照射部位是否應該包含骨盆腔淋巴結, 還是只針對攝護腺的部分做局部照射就好
clinical N0
主要有三篇RCT, 整理如下:
|
RTOG 9413
|
GETUG-01
|
POP-RT
|
T stage
|
T2c-T4:67%
|
T3: 25.5% (no T4)
|
T3b-T4: 46.4%
|
Pelvic nodal risk
|
>35% in 24.5%
|
>35% in 9.8%
|
>35% in 55%
|
Gleason score
|
GS 7-10: 72%
|
GS 7-10: 50.7%
|
GS7-10:90.2%
|
Baseline PSA
|
22.6 ng/ml
|
12 ng/ml
|
28.2 ng/ml
|
Staging imaging
|
CxR, pelvic CT or lymphangiogram, bone
scan
|
Chest & abdomen CT, bone scan
|
Pelvic MRI, PET/CT (80% PSMA)
|
Field upper Limit
|
L5-S1
|
S1-S2
|
L4-5 (common aortic LN)
|
RT technique
|
2D
|
2D or 3D-CRT
|
IMRT with IGRT
|
Pelvic dose
|
50.4Gy
|
46Gy
|
50Gy
|
Prostate dose
|
70.2Gy/1.8Gy
|
66.25-72Gy
/1.8-2Gy
|
68Gy/2.72Gy
|
ADT
|
4 months
|
4-8 months
|
>= 24 months
|
Result
|
NHT+WPRT and PORT+AHT are better, but no difference
between two arms(10yr PFS)
|
No difference in 5-yr PFS and 5 -yr OS
|
WPRT show better 5yr- biochemical failure
free survival (nodal risk >40%)
|
=> RTOG 9413 是2*2 design: neoadjuvant + concurrent ADT versus Adjuvant ADT, WPRT versus PORT
=> 目前做出來有差異的POP-RT trial, 其結果發現WPRT 跟 PORT 比, 5yr-BFFS 跟 5 yr-DFS 明顯比較好, 但是OS沒差, 去做細部分析, 發現nodal risk > 40%, 在BFFS方面, WPRT 會比PORT好
=> 因為RTOG 9413以及 GETUG-01都是使用比較古老的技術, 目前有一篇大家一直在等待結果的RTOG0924, 會提供針對這個主題的新證據
Clinical N1
Currently no high level evidence
Pathological N1
Currently no high level evidence
Salvage RT after prostatectomy
主要的evidence 目前只有一篇, 就是2018年的 ASTRO abstract, 由Pollack等人發表的SPPORT trial, 其實驗設計共有三個arm, 分別是PORT, PORT+ADT, WPRT+ADT, 結果發現在 5-yr freedom from progression (FFP) rates, WPRT+ADT明顯比較好, 不過副作用方面也比較多, 詳細結果可能要等full paper 發表
reference:
1. De Meerleer, Gert, et al. "Elective nodal radiotherapy in prostate cancer." The Lancet Oncology 22.8 (2021): e348-e357.
2. SPPORT trial