The role of surgery in advanced prostate cancer · • Understand prostate cancer metastases and...
Transcript of The role of surgery in advanced prostate cancer · • Understand prostate cancer metastases and...
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The role of surgery in advanced
prostate cancer
Brant A. Inman, MD, MS Cary N. Robertson Associate Professor of Urology
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Learning objectives
• Describe the lymphatic drainage of the prostate and
the role of lymphadenectomy
• Understand prostate cancer metastases and what
oligometastatic prostate cancer is
• Describe options for treating oligometastatic prostate
cancer
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Lymphatic drainage of the prostate
and lymphadenectomy
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Herman et al. Radiology 1963
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Lymph vessels grow out
from the lymph sacs
along the major veins
The paired posterior lymph
sacs develop from the iliac
veins
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Birth of Modern Day
Understanding
1904, Cuneo and Marcille
became the foundation for
future definitive works of the
prostate
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Intra-Prostate Lymphatics
• First level lymphatics start near the fine capillaries
forming a network around each glandular acinus
• Extend to periphery forming a second network at the
capsule surface
• “Peri-prostatic network”
Delamere. General anatomy of the lymphatics. Chicago 1904
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Prostate Lymphatics – 3 trunks
• Primary trunk
– Posterior prostate surface
– Ascends along bladder
– Crosses the internal iliac artery laterally
– Terminates on middle chain of external iliac node
packet
Delamere. General anatomy of the lymphatics. Chicago 1904
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Prostate Lymphatics – 3 trunks
• Second trunk
– Posterior prostate
– Follows the prostatic artery
– Terminates in the middle of the internal iliac node
packet
– Additional collecting trunks run para-rectal
terminating on sacral promontory
Delamere. General anatomy of the lymphatics. Chicago 1904
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Anterior-Posterior view of Pelvic Lympho-Vascular Anatomy
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• 30 cadavers and 59 patients
• Mean number of nodes = 22
• Mostly obturator and external iliac
Weingartner et al. J Urol 1996
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Why does the node count matter?
• Because if you don’t remove enough nodes, you will
be leaving cancer behind
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Node count Positive node rate
2-10 6%
10-14 9%
15-19 10%
20-40 18%
Briganti et al. Urology 2007
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The 6 regions
Bern: Mattei et al. Eur Urol 2008
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Primary lymphatic landing sites of the prostate transferred from 3D datasets and
superimposed into idealized anterior-posterior and medio-lateral projection of the pelvis
N=317
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Primary lymphatic landing sites of the prostate transferred from 3D datasets and
superimposed into idealized anterior-posterior and medio-lateral projection of the pelvis
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Bern: Mattei et al. Eur Urol 2008 N=317
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Note Omni Retractor
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Sentinel
Nodes
Positive
Node
Counts
Percent
positive
Bubble size proportional to node count
Leuven: Joniaui et al. Eur Urol 2013
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Prostate cancer metastases
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Where does prostate cancer spread to?
• Simple answer
– anywhere and everywhere
• Erudite answer:
– That is true but, certain patterns are much more
common than others
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Japan: Saitoh et al. Cancer 1984 N=1885
(1958-1979)
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Japan: Saitoh et al. Cancer 1984
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Japan: Saitoh et al. Cancer 1984
~75% of
bone mets
were in the
spine
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Bern: Bubendorf et al. Human Pathol 2000 N=1589
(1967-1995)
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Bern: Bubendorf et al. Human Pathol 2000
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28 Bern: Bubendorf et al. Human Pathol 2000
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Batson O. Annal Surg 1940
Batson’s vertebral
venous plexus
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Batson O. Annal Surg 1940
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Oligometastatic prostate cancer
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So what is oligometastatic prostate cancer?
32
Tosoaian et al. Nature Rev Urology 2017
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Tosoaian et al. Nature Rev Urology 2017
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Despite the lack of a consensus definition,
does treating oligometastatic prostate cancer
with aggressive curative intent offer benefit?
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Maybe…
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JHU: Makarov et al. J Urol 2008
Recall that the untreated natural history of metastatic
prostate cancer can be very long
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Different ways to get at this question
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Study design Problems
Population level data (e.g. SEER)
-Non-standardized imaging/staging
-Non-standardized treatment
-Selection bias
Case series and cohort studies
(single or multicenter) -Selection bias
Prospective trials
-Expensive
-Take long to get answer
-Many treatment options, which one to
choose?
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SEER (US): Culp et al. Eur Urol 2014
N = 8,185 M1 pts
RP 245, BT 129, NSR 7,811
2004-2010
This study was one of the first population studies to suggest
local therapy might have benefit
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NCDB (US): Loppenberg et al. Eur Urol 2016
N = 15,501 M1 pts
(1,470 got local therapy)
2004-2012
Low-risk patients seemed to benefit more from local therapy
(RP, brachy, EBRT)
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SEER-Medicare (US): Satkunasivam et al. J Urol 2015
N = 4,069 M1 pts
RP 47, IMRT 88, CRT 107, No local 3,827
2004-2009
SEER-Medicare data allow better
confounder adjustments for treatments
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Italy: Gandaglia et al. Eur Urol 2016
RP for prostate cancer with bone mets (MRI or bone scan)
N = 11
(2006-2011)
Median PSA = 11
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NCDB (US): Rustoven et al. J Clin Oncol 2016
Yet another population study
N=6,382
ADT 5844, EDT+RT 538, RP 69
2004-2012
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MSKCC: O’Shaughnessy et al. Urology 2016
09/29/16
19
19
Figure 1. Percentage of patients that achieved undetectable PSA during the treatment phase increased with each component of multimodal
therapy. Response to treatment was assessed with serum PSA measurements and the frequency of patients who achieved undetectable PSA
after ADT alone, ADT + Surgery, and ADT + Surgery + Radiation is shown. M1a = extrapelvic nodal disease; M1b =bone metastasis
0%
80%
100%
33%
73%
93%
25%
75%
95%
0%
20%
40%
60%
80%
100%
ADT Alone ADT + Surgery ADT + Surgery + Radiation
M1a M1b Total
Page 19 of 29
Multimodality treatment to achieve undetectable PSA
N=20
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43 Mayo: Karnes et al. J Urol 2015
11C-Choline PET-directed salvage lymphadenectomy
N = 52
Median PSA = 2.2
100% prior RP
80% post-RP therapy (EBRT, ADT, etc…)
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What about targeting the mets with radiation?
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Tosoaian et al. Nature Rev Urology 2017
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Summary of important points (1)
• LND quality = node count
– In high risk patients, aim for ≥ 20 nodes
• Prostate cancer metastases
– Nodes > Bone > Lung
• Oligometastatic prostate cancer probably has better
outcome than normal polymetastatic prostate cancer
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Summary of important points (2)
• Treatment of the prostate may provide some benefit
in oligometastatic patients
– All options seem reasonable
– Best data for RP, brachy and EBRT
• Treatment of the mets may also provide some benefit
– LND or EBRT for nodal mets
– EBRT for bony mets
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