Presentation on theme: "False negatives are common with initial and follow-up biopsies. Patients with false negatives are managed in the same manner as those with true negatives."— Presentation transcript:
False negatives are common with initial and follow-up biopsies. Patients with false negatives are managed in the same manner as those with true negatives. Biopsies don’t tell the whole story. Each core represents 1/2000 of a normal size prostate (30 g). As many as 30% of initial negatives prove to be positive on repeat biopsies.
What if you could determine the difference between a false negative and a true negative?
Now you can with the Prostate Core Mitomic Test.
Negative PCMT Result Confirm a true negative with Patient A Request PCMT Age 62, persistently rising PSA, family history Biopsy outcome 92% negative predictive value.
Patient B Request PCMT Age 62, persistently rising PSA, family history Positive PCMT Result 85% sensitivity. Identify patients at high risk for undiagnosed prostate cancer with Biopsy outcome
Confidently stratify your patients.
Negative PCMT result Be more confident in negative results. Provide peace of mind to patients. Avoid causing patients added pain, anxiety, and risk from unnecessary, extra biopsies. Detect undiagnosed prostate cancer early. Manage patient based on positive PCMT result and additional risk factors. Tailor patient management for improved patient care. Positive PCMT result
Patient SelectionClinical Response Positive biopsy outcome (30%) Negative biopsy outcome (70%) PSA > 4.0 ng/ml PSADT < 3 months PSAV > 0.4 ng/ml/year Life Expectancy > 10 years ASAP HGPIN Family History African American PCMT negative outcome Patient currently at low risk of undiagnosed prostate cancer. Defer repeat biopsy and routine screening 12 to 14 months. PCMT positive outcome Patient is at high risk for undiagnosed prostate cancer. A repeat biopsy is recommended with presence of additional risk factors.
Tumor field effect
Identifies a large-scale deletion in mitochondrial DNA that indicates cellular change associated with undiagnosed prostate cancer. Detects presence of malignant cells in normal appearing tissue across an extended area.
Why mitochondrial DNA?
Why mitochondrial DNA (mtDNA)? Mass copy rate allows for the most extensive field effect possible. Mutations associated with prostate cancer appear in tumors and normal tissue. High susceptibility to damage enables unprecedented early disease detection. The Prostate Core Mitomic Test detects large- scale mtDNA deletion to discriminate between benign and malignant prostate tissue.
Key Data Review
Powerful differentiator of malignant and non- malignant prostate tissue (p<0.0001) Demographics Patients183 Total biopsy cores 296 Age67.05 Maki J, et al. Mitochondrial Genome Deletion Aids in the Identification of False- and True-Negative Prostate Needle Core Biopsy Specimens. American Journal of Clinical Pathology. 2008; 129: Deletion accurately discriminates between biopsies having prostate cancer and those without (AUC 0.83) Non-malignant pathologies (HGPIN, atrophy, etc) do not confound this discriminatory power.*
Accurate predictor of repeat biopsy outcomes Robinson K, Creed J, Reguly B, Powell C, Wittock R, Klein D, et al. Accurate prediction of repeat prostate biopsy outcomes by a mitochondrial DNA deletion assay. Prostate cancer and prostatic diseases. 2010;13(2): Demographics Patients101 Total biopsy cores 595 Age60.64 PSA7.09 ng/ml Interval between biopsy Up to 14 months Identifies men who do not require biopsy with a high degree of certainty (SE 85%, SP 54%; NPV 92%; false negative rate 15%)
Mills et al. Large-Scale 3.4kb Mitochondrial Genome Deletion is Significantly Associated with a Prostate Cancer Field Effect. Poster presented as part of the American Urological Association Annual Meeting, San Diego, CA, May 4-8, Journal of Urology, Vol. 189, No. 4S, Supplement e604, May MethodPurposeResult 19 radical prostatectomies with peripheral, unifocal low volume tumor Assess biomarker frequency at increasing distance from tumor All cores were positive for biomarker which confirms the great extent of the tumor field 26 cystoprostatecomies – malignancy in bladder but not in prostate gland Determine frequency in cystoprostatectomies where malignancy was not found in prostate Low quantity of biomarker supports specificity of biomarker for prostate cancer negative result on all specimens which confirms biomarker is prostate cancer specific 21 malignant seminal vesicles from malignant prostatectomies Determine frequency in malignant seminal vesicles taken during prostatectomy Low volume of biomarker supports tissue specificity for prostate cancer 21 benign seminal vesicles from malignant prostatectomies Determine frequency in benign seminal vesicles taken during prostatectomy Low volume of biomarker supports tissue specificity for prostate cancer Disease specific with extensive tumor field
Parr RL, Jakupciak JP, Reguly B, and Dakubo GD. 3.4kb Mitochondrial Genome Deletion Serves as a Surrogate Predictive Biomarker for Prostate Cancer in Histopathologically Benign Biopsy Cores. Canadian Urological Association Journal DemographicsCase 2 Patients4Age65 Total biopsy2-4/patientPSA8.9 ng/ml Initial negative biopsy YesBiopsy 1Negative (9 cores) Positive repeat biopsy Yes (3)Biopsy 2 (7 months) Negative (10 cores) Predicted malignant outcome 11, 21 and 31 months in advance of RP Biopsy 3 (1 year) Positive for prostate cancer in LB / HGPIN in RB Benign outcome confirmed 60 months in advance of follow up biopsy RP (2 months)Tumor involvement in both L&R lobes. Largest mass in LM. Cores from LM in all 3 biopsies returned negative. PCMT performed on initial biopsy Positive for biomarker 21 months in advance of RP. Identified in LM.
Published data John Mills, Luis Martin, François Guimont, Brian Reguly, Andrew Harbottle, John Pedersen, Jennifer Creed, Ryan Parr. Large-Scale 3.4kb Mitochondrial Genome Deletion is Significantly Associated with a Prostate Cancer Field Effect. Poster presented as part of the American Urological Association Annual Meeting, San Diego, CA, May 4-8, Abstract published in Journal of Urology, Vol. 189, No. 4S, Supplement e604, May Ryan Parr, John Mills, Andrew Harbottle, Jennifer Creed, Gregory Crewdson, Brian Reguly, Francois Guimont. Mitochondria, Prostate Cancer and Biopsy Sampling Error. Discovery Medicine, Volume 15, Number 83, April Parr and Martin: Mitochondrial and nuclear genomics and the emergence of personalized medicine. Human Genomics :3. Kent Froberg, Laurence Klotz, Kerry Robinson, Jennifer Creed, Brian Reguly, Cortney Powell, Daniel Klein, Andrea Maggrah, Roy Wittock, Ryan Parr. Large-scale mitochondrial genome deletion as an aid for negative prostate biopsy uncertainty. Poster presented as a part of the American Urological Association Annual Meeting, Washington, D.C., May 14-19, Abstract published in The Journal of Urology, Vol. 185 No. 4S, e 764, Supplement, May Ryan Parr, Jennifer Creed, Brian Reguly, Cortney Powell, Roy Wittock, Daniel Klein, Andrea Maggrah, Kerry Robinson* Large-scale mitochondrial genome deletion as an aid for negative prostate biopsy uncertainty. Poster presented as part of the Society of Urologic Oncology Annual Meeting, Bethesda, MD, Dec. 8-10, 2010.
Published data Parr RL, Jakupciak JP, Reguly B, and Dakubo GD. 3.4kb “Mitochondrial Genome Deletion Serves as a Surrogate Predictive Biomarker for Prostate Cancer in Histopathologically Benign Biopsy Cores.” Canadian Urological Association Journal Robinson K, Creed J, Reguly B, Powell C, Wittock R, Klein D, et al. Accurate prediction of repeat prostate biopsy outcomes by a mitochondrial DNA deletion assay. Prostate cancer and prostatic diseases. 2010;13(2): Epub 2010/01/20. Parr RL, Jakupciak JP, Birch-Machin MA, Dakubo GD. The Mitochondrial Genome: A Biosensor for Early Cancer Detection? Expert Opin Med Diagn. 2007;1(2): Maki J, Robinson K, Reguly B, Alexander J, Wittock R, Aguirre A, et al. Mitochondrial genome deletion aids in the identification of false- and true-negative prostate needle core biopsy specimens. American journal of clinical pathology. 2008;129(1): Epub 2007/12/20. Dakubo GD, Jakupciak JP, Birch-Machin MA, Parr RL. Clinical Implications and Utility of Field Cancerization. Cancer Cell International. 2007;7(2). Parr RL, Dakubo GD, Crandall KA, Maki J, Reguly B, Aguirre A, et al. Somatic mitochondrial DNA mutations in prostate cancer and normal appearing adjacent glands in comparison to age-matched prostate samples without malignant histology. The Journal of molecular diagnostics : JMD. 2006;8(3): Epub 2006/07/11. Parr RLM, J.; Reguly, B.; Dakubo, G.D.; Aguirre, A.; Wittock, R.; Robinson, K.; Jakupciak,J.P.;Thayer, R.E. The pseudo-mitochondrial genome influences mistakes in heteroplasmy interpretation. BMC Genomics. 2006;21(7).