Professor Abhay Rane OBE

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Presentation transcript:

Professor Abhay Rane OBE PSA and prostate cancer: current concepts and future management strategies Professor Abhay Rane OBE

Cancer and urology The incidence of all cancers in general rises with increasing age 75% of urology patients are above the age of 70 therefore the incidence of urology cancers is high, and is rising further with an increasing elderly population

The strongest known risk factors for prostate cancer are increasing age, ethnic origin and family history Factors known to increase the risk of developing prostate cancer include:1-3 Age Very low risk in men aged < 50 years, but after this risk increases with age Family history Men with ≥ 1 first-degree relative diagnosed with prostate cancer have an increased risk, especially if the relative was diagnosed aged < 60 years Ethnic group Men of West African or Caribbean origin have a higher risk of prostate cancer than white men Dietary and nutritional factors may have an impact on risk1-3 Foods containing lycopene and selenium may offer a protective effect Although the causes of prostate cancer are unknown, there are some factors that are known to increase a man's chance of developing the disease, including increasing age, family history and ethnicity.1-3 The strongest know risk factor for prostate cancer is age, with very low risk in men under the age of 50, but risk increasing with age thereafter.2,3 Men with one or more first-degree relatives (father, brother, or son) diagnosed with prostate cancer have an increased risk of prostate cancer, especially if the relative was diagnosed before the age of 60.1-3 It has been estimated that 5-10% of all prostate cancer cases and 30-40% of early-onset cases (men diagnosed <55 years) are caused by inherited susceptibility genes. A strong family history of breast cancer may also affect a man’s risk of prostate cancer, particularly if the family members were diagnosed < 60 years. Patients with hereditary prostate cancer usually have an onset 6–7 years prior to spontaneous cases, but do not differ in any other way.1 West African men and black men from the Caribbean have a higher risk of prostate cancer than white men.1-3 Men born in Asia have a lower risk of prostate cancer than men born in the UK.1-3 Diet has been researched because of the large variation in prostate cancer incidence between different cultures, particularly the Asian versus ‘western’ diet.3 A recent review of the evidence concluded that foods containing lycopenes (tomatoes and tomato products) and selenium probably have a protective effect while diets high in calcium may increase risk. Notes references Heidenreich A, et al. EAU guidelines on prostate cancer. March 2009. Macmillan Cancer Support. 2007. http://www.macmillan.org.uk/Cancerinformation/Cancertypes/Prostate/Aboutprostatecancer/Causes.aspx [Last accessed January 18th 2010]. Cancer Research UK, 2009. http://info.cancerresearchuk.org/cancerstats/types/prostate/riskfactors/index.htm [Last accessed January 18th 2010]. EAU, 2009. Macmillan Cancer Support, 2007. Cancer Reasearch UK, 2009.

Prostate cancer Clinical presentation   Most present with signs / symptoms of BOO ~ 10% present with symptoms relating to metastases, ie. backache or path # Incidental diagnosis after TURP No physical signs in majority of patients

Prostate cancer PSA or prostate specific antigen 240 amino acid single chain glycoprotein serine protease: liquefies the seminal coagulum that is formed after ejaculation half life of PSA is 2.2-3.2 days. Upper limit of ‘normal’ reference range 4 ng/ml

Prostate cancer If PSA > 10, risk of cancer on biopsy ~60% - only 2% of patients with BPH have PSA >10 If PSA between 4.1 and 10, risk of cancer on prostatic biopsy falls to ~20%. Overall, if PSA is greater than 4 ng/ml likelihood of prostate cancer is ~25-30%.

Prostate cancer PSA is prostate specific Not cancer specific What can be done to improve its utility?

Prostate cancer PSA Density Correction for the BPH contribution to the PSA value. Divide PSA value by the gland volume cc Values above 0.15: suspicious of malignancy

Prostate cancer PSA Velocity Over a year very suspicious if rise of more than 20% increase of 0.75 ng/dl

Prostate cancer Age adjusted PSA Values increase gradually with age Upper limits of ‘normal’: Age 40 - 49, 2.5 ug/ml Age 50 - 59, 3.5 ug/ml Age 60 - 69, 4.5 ug/ml Age 70 - 79, 6.5 ug/ml

Prostate cancer ‘Free’ and ‘Bound’ PSA In BPH, free PSA levels are generally increased ‘Free PSA is good PSA!’ In prostate cancer, bound PSA levels are raised Best used to determine necessity for re biopsy if initial biopsy benign with an elevated PSA

Digital rectal examination (DRE) simplest / safest means of detection palpable irregularity ~ 50% chance of being a carcinoma abnormal findings = biopsy of the prostate (irrespective of serum PSA)

TRUS biopsies Risks Septicaemia 1-2% Death 0.03% Haematuria Haematospermia Pain and discomfort Anxiety of false negative biopsies 10-15%

Grading by Gleason scoring 5 different histological grades of tumour differentiation recognised For each tumour therefore, two grades are determined added together to provide a Gleason score ranging from 2 – 10 ‘the higher the score, the worse the tumour’

Screening for prostate cancer Value of screening asymptomatic men controversial 

Criteria for screening Disease Common in target population Serious Curable Screening test(s) Sensitive and Specific Acceptable to the target population Identify significant disease

Criteria for screening Treatment Improve outcome Clear proven benefit of early vs late treatment Overall benefit should outweigh the overall physical or psychological harm Adequate staffing and facilities for the diagnosis and treatment of abnormalities detected

Screening prostate cancer? For Early diagnosis Reduced mortality Reduced morbidity Reduced metastatic disease Reassurance Reduced costs? Against Unnecessary biopsies Insignificant disease? Unnecessary treatment Treatment side effects Increased cost? Increased anxiety

SCIENCE TIMES, April 9 2002

The huge increase in the incidence of prostate cancer is not reflected in prostate cancer mortality rates Over the last 30 years, prostate cancer incidence rates have almost tripled from 33 per 100,000 in 1975 to 1,997 per 100,000 in 20061 Much of the increase in incidence is due to increased detection through widespread use of the prostate-specific antigen (PSA) test Age standardised (European) incidence an mortality rates of prostate cancer, GB 1975–20071 Although there has been a huge rise in prostate cancer incidence over the last 20 years, this has not been reflected in mortality rates.1 Over the last 30 years prostate cancer rates in Great Britain have almost tripled.1 Much of the increase in incidence is due to increased detection through widespread use of the prostate specific antigen (PSA) test.1 During the last ten years in the UK, European age-standardised rates have increased by almost 40% from 71 per 100,000 in 1997 to 97 per 100,000 in 2006 while the numbers of cases diagnosed rose from 23,741 in 1997 to 35,515 in 2006, an increase of 50%.1 Time trends for 1975–2006 show European age-standardised rates have almost trebled from 33 per 100,000 in 1975 to 97 per 100,000 in 2006.1 As the incidence of prostate cancer is high and five-year survival rates are around 70% many men are living with the diagnosis of prostate cancer.1 An estimated 215,000 men are alive in the UK having received a diagnosis of prostate cancer.1 Notes references Cancer Research UK. 2009. http://info.cancerresearchuk.org/cancerstats/types/prostate/incidence/index.htm#source6 [Last accessed 14th January 2010]. Cancer Research UK, 2009. 22

Dilemma 50 year old male, completely asymptomatic, requests PSA test, because he has read about it in the newspapers or heard that his friend has had one done

BAUS recommendations PSA test conducted in asymptomatic patients who request it appropriate counselling prior to test careful interpretation PSA only measured if appropriate to act on results

NICE guidelines 2014

Active surveillance for CaP

Prostate health Lycopenes (from tomatoes) Cruciferous vegetables precursors of vitamin A cooked tomatoes have higher content Cruciferous vegetables phyto oestrogens Soya bean produce isoflavones gut phyto oestrogens Selenium antioxidant / ?apoptotic

Future? Focal therapy? Observation following template biopsies? Stereotactic hypofractionated accurate RT? Prostate cancer vaccine sipuleucel-T (Provenge) … for advanced CaP

Thank you