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Liver Metastases Jean-Bernard Poulard MD, MBA, FACS Mount Sinai School of Medicine Queens Hospital Center Jamaica, NY
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Liver Metastases
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30 Years Ago, Considered Incurable
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Liver Metastasis Extent of the problem Primary Cancers and Mets Liver structure and function considerations Excision and its evolution Chemo as an adjunct Ablative Approaches Current Recommendations The Future
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Liver Metastases- Biology Fertile Circulation. Systemic and Portal Biliary Component Primary Drainage for GI Tract /Pancreas Functional Importance Regenerative Capacity Abused and Insult (alcohol and Viruses)
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Liver Mets- Extant of Problem Demographics of Colorectal Cancer Other Gastro-Intestinal Cancers Other Sites Sites Where Treatment Benefits Sites with No Benefit
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Liver Metastases Practical Considerations Function Accessability Resectability Technical Considerations (Support) Equipment and Machinery Surgical and Interventional Expertise Critical Care
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Liver Mets -Metastasectomy Indications Tissue Diagnosis Size and Number and Lobes Timing Chemo Pre-Resection? Risks Morbidity and Mortality Outcome
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Liver Mets - Metastasectomy Extra-Hepatic Disease: Containdication? Used to Be But if Extra-hepatic and Mets Resectable If R 0 Possible – 5 yr 29-38% (Elias et al, BJS 2003; 90: 567-74)
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Liver Metastases-HAI Rationale for Hepatic Artery Infusion –Not Amenable to Excision Technical Considerations Risks and Pitfalls (misperfusion, Art Injury) Evolution and Current Practice Chemo Agents: 5-FUDR (+ leucovorin and Dexamethasone), –Results: RR 78%, Median Survival 25 mos Kemeny N. J Clin. Onc. 1994; 23:2288
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Liver Metastases HAI 2 Oxaliplatin and Irinotecan –Scant Data but Safe via HA –28 Pts with Isolated Liver Mets –Oxaliplatin Followed by IV 5-FU and Leucovorin –Objective RR 64% Median Survival 28 Mos J. Clin. Onc. 2005; 23:275s
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Liver Metastases-Ablation 1 Indications Modalities –Intratumoral, Cryo, Radiation, Thermal Common Attributes Degree of Invasiveness
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Liver Metastases- Intratumoral Percutaneous Ethanol and Acetic Acid Used in small HCC (Japan) Difficult Access for Some Lesions Etoh not Effective in Other Histologies Consensus: Etoh not Appropriate Acetic Acid
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Liver Metastasis - Cryoablation Techniques Failure Rate: 10-44% (Most in Non-Frozen sites) Sometimes after Incomplete Excision Survival 24-38% 5 year Drawback: Requires Laparotomy Obsolescent?
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Liver Metastases- Radiation External Beam Therapy Limited –Tolerance 35 Gy vs 70 Gy to Destroy CA Stereotactic for Small Tumors Brachytherapy : I- 125 Seeds Rarely used after Incomplete Excision –Complex Logistics, Cryo Preferred Radioembolization Y-90 tagged Resin or Glass microspheres Used with HAI of FUDR (RR 44 vs 18) Similar Toxicity, No Signicant Survival Benefit (Xcpt>15) Ann. Onc. 2001; 12: 1711
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Liver Metastases Thermal Ablation 1 Modalities –Radiofrequency Ablation –Laser and Microwaves (Europe) Limitations –Control of Margin –Specificity of Tissue Damage Advantage –Percutaneous Approach
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Liver Metastases Radiofrequency Generator
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Liver Metastases -RFA Used in HCC and Liver Mets Open, Laparoscopic or Percutaneous –Relation to Recurrences –Experience, Type of Equipment Pitfalls: Intestinal and Diaphragm Injuries Portal Vein Thrombosis Mortality 0-2% Major Complications 6-9% Outcome: Median Survival 24 Months
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Liver Metastases- Recommendations Resection for Cure is First Option Potentially Resectable if Lesions Smaller –Systemic Chemo and Reevaluation Limited Number of Mets but Not Surgical Candidate: –Ablation (RFA Preferred) –HAI
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Liver Metastases- The Future CRC The M.D. Anderson’s Approach Up to 1992, 35% Survival for Stage 4 CRC Post 1992, Up to 58% –Anesthesia, Surgery, Hemostatics, Imaging, Intesive Care Surgical Excision as Primary Tx –Better Chemo Alone or RFA <20% Solitary Met Excision 71% Survival 5 Yrs
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Liver Metastasis- The Future 2 CRC Majority are Unresectable at Presentation Make Them Resectable? Prospective Trial –Combination Chemotherapy –Staged Hepatectomy –Portal Vein Embolization Determine Remnant of Viable Liver Size and Number of Mets not Factor
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Liver Metastases – The Future 3 CRC Response Rate to Cytotoxic with Biologic –Up to 50% Portal Vein Embolization –Induces Increase in Volume of the Liver –Increases the Function Regeneration –2-4 Weeks in Normal Liver –6-8 Weeks for Diabetics and Cirrhotics
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Liver Metastases- The Future 4 CRC Stage Resection For Bilateral Lobe Involvement Chemo- Excise From one Lobe PVE – Liver Regenaration Resect from Other Lobe Survival 40% 80% of Liver Volume can be Resected Use 3-D CT Volumetry Surgical Mortality.8%
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Liver Metastases Prevention? Stage 2 and 3 CRC Hepatic and Regional Chemo Before Surgery Randomized, No significant Morbidity Time to Liver Mets 16 vs 8 mos. Incidence 20.6 vs 28.3 Disease Free Survival 74vs 58.1 (3 yr) Overall 87.7 vs 75.7 No Benefit for Stage 2 Xu et al. Ann Surg. 2007; 245:583-90
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Liver Metastases Gastric Cancer Hepatic Metasectomy done Rarely Isolated Liver Involvement Rare (.5%) Long Term Survival is Rare Non-RandomIzed Series 37 patients -HAI –5 FU chemo –Gastrectomy and HAI –Better Response –But No Increase Survival Ojima et Al. World J Surg. 2007; 5: 70
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Liver Metastases Final Word Screen, Screen, Screen for CRC Polypectomy may be Preventive Early Cancers are Curable Have you Had Your Colonoscopy? Thank You
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