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Prostate Cancer Screening
1
Murali Sundram
Consultant Urologist
Hospital KL
1st Malaysian Men’s Health Conference 2018
TOPICS ON PROSTATE CANCER
• Epidemiology of Prostate cancer
• How to Screen
• Screening controversies
• Opportunistic screening
2
3
EPIDEMIOLOGY OF PROSTATE CANCER
Prostate Cancer in the West
• Most common male cancer in the West
• 2nd most common cause of cancer death
• Lifetime risk of :
Developing prostate cancer 30%
Dying from prostate cancer is 3%
• Commonly a slow growing disease in elderly men which
may not be harmful during his lifetime
4
5
World wide Incidence of Prostate Cancer
6
Prostate Cancer in Malaysia
Age Standardized Incidence rate (ASR) :12 per 100,000 population
Chinese > Indians >Malays
Men 60-70 > Men 50-60
7
Age adjusted incidence rates of prostate
cancer in 6 Asian countries
Country % change incidence
from 1978-1982 to
1993-1997
Philippines 49.5
Singapore 118.2
Japan 110.4
China 38.7
India 10.8
Thailand 5.0
8European Journal of Cancer 2005
Increasing incidence of prostate
cancer in Asia
• Westernization of Asian diets with loss of cultural protective factors.
• Better reporting of cases
• Increasing use of serum PSA
• Ageing population
9
Projected growth of Asia’s Elderly Population > 65 yr. United Nation 2001
Region/
subregion
No people >65 yrs (1,000s)% Increase
2000-20502000 2025 2050
Asia 206822 456303 857040 314
East Asia 114729 244082 393802 243
Southeast
Asia24335 57836 128958 430 %
South Asia 67758 154385 334280 393
Risk factors• Age > 50 yrs
• Ethnicity blacks > whites >asians
• Family history of prostate cancer. Ist degree relatives ( father, son , brother ) have X2 the risk
• Genetic predisposition to other cancers
Breast cancer or ovarian cancer
Hereditary colorectal cancer
• Environmental Factors
11
Changes in Prostate Cancer Incidence
Rates for Asians Migrants to the US
12
1,8
14,9
China (Changai) USA (San Francisco)
5,1
16,5
Japan (Osaka) USA (San Francisco)
Eur Urol 1999;35 : 377-387
13
Screening for Prostate Cancer
Screening
• Finding cancer early before the
development of symptoms with the hope
that early detection leads to effective
treatment and reduces the risk of dying
from that particular cancer
• Digital rectal examination
• Serum PSA
14
PSA (Prostate Specific Antigen)
• Produced by prostate gland
• Some PSA escapes from
the prostate into the blood
and we can detect this by a
PSA test
• Normal PSA level is 0-4
ng/ml
Causes of raised PSA
Acute retention of urine
Infection
Bladder Stones
Ejaculation
Cycling
Urethral instrumentation
PSA ( Prostate Specific Antigen)
• PSA provides a lead time of 6-7
years before clinical cancer
• Persistently raised PSA
4-10 , there is a 30% chance of cancer
> 10 , there is a 50% chance of cancer
17
Transrectal Prostatic Biopsy
Complications
• Haematuria
• Haemospermia
• Urinary tract infection
• Sepsis ( & death)
18
Multiparametric MRI of prostate
Transperineal Prostate Biopsy
20
Screening Debate
21
Screening YES or NO ?
• Screening decreases death rate by 20% but
need to screen 1000men and treat 37 men to
save I life
? Cost effective
• Screening detects many cancers that will not
harm the patient in his life time but are still
treated
? Over diagnosis & Over treatment
22
Patient Decision Aids
23
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How to screen
• Start at age of 50yrs ( 45 for men at risk)
• Screening interval of 2 years
• Stop at age of 70 yrs
• Do not screen men with poor health or life
expectancy < 10 yrs
• Baseline PSA at age of 40 yrs ?
• interpretation of PSA in men taking BPH
medication
25
Health Screening
26
Opportunistic Screening / Case Finding
• This refers to screening of Symptomatic
men and is recommended
• Patients > 50 yrs with voiding symptoms
should have a PSA as part of the
investigations
• Patients who are on certain types of BPH
medication should have the their PSA
adjusted
27
Work up of patients with voiding symptoms
• Urinalysis
Urine Culture
• Renal function
• PSA
• KUB Ultra Sound
28
SUMMARY
• Asia’s population is ageing rapidly
• Incidence of Prostate cancer in Asia appears to be
increasing
• Population screening of asyptomatic men is not
recommended
• Screening may be offered to well informed men in
the context of a shared decision making process
• Opportunistic screening of symptomatic men is
recommended
29
30
THANK YOU
31
Shared Decision Making
• Is a strategy for making a health care decision when there is more than one medically reasonable choice
• Joint decision making process between doctor and the patient
• Important that men receive BALANCED information to assist then in making an informed decision
32
33
Does screening of Prostate Cancer lead
to better outcomes ?
• Does early diagnosis and treatment lead to decreased mortality ?
• No definite consensus
• Randomized trial neededScreening versus no screening
34
European Randomized Study of Screening for
Prostate Cancer (ERSPC) NEJM March 2012
• Trial initiated in 1991
• 180,00 men aged 50-74 from 8 European countries
• Screened at 4 year interval and followed up for 11 years
• Results of this trial can be used to advise men on whether they want to be screened for prostate cancer
35
PSA Testing
• Health Screening Programs for Asymptomatic patients
• Patients presenting with LUTS symptoms to the GP
This is NOT screening but Case finding
• Increased use of PSA testing by Primary Care
Physicians
Standard of care
Fear of litigation
Voss JD prostate cancer screening and
beliefs J Gen Inter Med 2001
36
Screening detects more cancer
PSA SCREENING
96 cases of cancer
NO PSA SCREENING
60 cases of cancer
37
Screening decreases mortality by 20 %
PSA SCREENING
4 patients died
NO PSA SCREENING
5 patients died
38
Is Screening beneficial ?
• Screening reduced mortality from prostate cancer
(relative risk reduction of 20%)
• But to prevent I death from prostate cancer you need to screen 1000 men over 10 years and treat 37 cancers
• Unanswered Questions
Is it cost effective ?
Does benefits outweigh the harm ?
39
American Guidelines prostate cancer screening 2013
Recommended
• PSA screening in men 55-69yr who are well informed and wish to be screened
• Screening interval of 2 years
• Shared decision making
40
American Guidelines prostate cancer screening 2013
Not recommended
• < 40 yrs
40-54 with average risk of
prostate cancer
>70 yrs
< 10 yr life expectancy
• In the scenario where shared-decision making is not routine practice
41
Prostate Cancer in Malaysia
• NO national screening program for prostate cancer
• Nation wide prostate awareness campaigns
(1998, 1999, 2001, 2003, 2005, 2007)
• Private health screening
• Case finding when patient presents with symptoms of BPH to the primary care physician
42
Prevention of Prostate Cancer
43
Dietary Advise
44
Anything which is heart healthy is also prostate healthy
Fibre, vegetables and fruit √ red meat ×
Selenium & Vit C cancer prevention trial
(SELECT)
• 35,000 men were randomized to receive
selenium, vit E, combination or placebo
• Follow-up was 7-12 years
• No reduction in the risk of prostate cancer with
selenium
• Men who took vit E 400IU/day had a 17%
increase in the risk of prostate cancer
45
Obesity (BMI>25)
46
Difficulty in detecting
prostate cancer in
obese men
In Men with prostate cancer obesity is linked
to more ggressive cancer
47
• Increased risk of
recurrence after
treatment
• Increased risk of
death
Chemoprevention with 5-ARIs
• 5ARIs ( finasteride/dutesteride)
• Reduce the overall risk of prostate cancer
• May increase the risk for high grade cancer
• Chemoprevention is an off label indication
• Cause a 50% reduction in PSA value which
may give patients a false sense of security
that could delay a diagnosis of cancer
48
49
DIAGNOSTIC WORKUP
Symptoms
1. Asymptomatic with raised PSA
2. Urinary symptoms
(LUTS)
3. Symptoms related to spread of
the cancer
50
Mr Warren, 70 yr old male schoolteacher
• Chief Complaint of LUTS
( Lower Urinary Tract symptoms )
• Main concerns
Do I have a prostate problem ?
Do I have cancer ?
51
Causes of LUTS (Lower urinary tract
symptoms)
Bladder
Cancer, Stones,
Cystitis, TB
Functional disorders
Neurogenic Bladder
Prostate
BPH, cancer
prostatitis
Urethra
Stones, strictures
52
NEUROGENIC BLADDER
53
Bladder
Continence center
Brain
Stroke,
Parkinsons
Tumour
Meningitis
MS
Spinal cord
Trauma,
Metastatsis
TB
Peripheral
nerves
DM
surgery
Diagnostic workupHISTORY
• Voiding history
Voiding diary
Haematuria ?
• Diseases of the genitourinary tract
• Neurological disease
DMCurrent medications
• Sexual function
Time interval Urine Passed
Mid-night – 1.00
220 ml1.00 – 2.00
2.00 – 3.00
3.00 – 4.00 200 ml
4.00 – 5.00
5.00 – 6.00
225 ml6.00 – 7.00
7.00 – 8.00
8.00 – 9.00 150 ml
9.00 – 10.00
10.00 – 11.00
11.00 – 12.00 200 ml
54
Diagnostic workup
Physical Examination
• Palpable Bladder/Kidneys
• Genitalia
• Neurological examination of the LL
• DRE ( Digital rectal Examination)
55
Physical Exam
56
Neurological Exination
57
KUB
58
Ultrasound
59
• All Tests were within normal ranges
PSA 2.5ng/ml
• In men > 50yrs with LUTS and a negative workup the most common diagnosis is BPH
• Medical management of BPH was commenced.
@ blocker was the first line therapy
Later 5 @ reductase inhibitor was added (proscar/dutesteride)
• Advised to repeat his PSA in a year
60
• A year later he had a repeat PSA
PSA increased to 3.5 ng/ml
Prostate was normal on DRE
• What would you advise ?
61
3
• He is on a 5@ reductase inhibitor
which will decreases PSA by half
• His real PSA is 3.5 X 2 = 7 ng/ml
• Reevaluate the patient and repeat the PSA
• Repeat PSA was still > 4, recommend he see
a urologist for a prostatic biopsy
62
Histopathological Report
• Adenocarcinoma of the
Prostate
• Grade 7
• What does that mean ?
63
Grading of Prostate Cancers
Grade 4-6
LOW GRADE CANCERSGrade 7-10
HIGH GRADE CANCERS
64
More likely to die WITH the
cancerMore likely to die BECAUSE of
the cancer
Staging
Local staging
• Rectal Examination
• MRI of the prostate
Metastatic staging
• Bone Scan
• CT /US Abdomen
65
Counseling
66
Prostate Cancer Screening
67
Murali Sundram
Consultant Urologist
Hospital KL
1st Malaysian Men’s Health Conference 2018