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Surgical Case Presentation
Jared B. Smith M.D.February 5, 2007
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History and Physical Examination:
▪ CC: Large colonic polyp▪ HPI: 66 y.o. male with known CAD, status-post screening colonoscopy:▸ 4-cm, broad-based, flat polyp mid distal ascending colon▸ Tubulovillous adenoma on pathology▸ No gastrointestinal complaints
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History and Physical Examination:
▪ Past Medical History: ▸ HTN▸ DJD, Left Knee▸ Coronary Artery Disease; 2 known stenoses; Routine Stress-Thallium test pending
▪ Past Surgical History: None
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History and Physical Examination:
▪ Allergies: None▪ Medications:▸ Metoprolol▸ Lisinopril▸ Atorvastatin▸ Aspirin
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History and Physical Examination:
▪ Family History: CAD in mother & two brothers. No malignancies. ▪ Social History: Former smoker, 10 pack- years
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History and Physical Examination:
▪ Review of Systems: ▸ Chest pain with moderate exertion▸ No melena, changes in bowel habits, or gastrointestinal complaints
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History and Physical Examination:
▪ 5'3'’, 170 lbs▪ Abdomen: Obese, no scars. Soft, palpable, right, mid-abdominal mass 10 x 10 cm. No tenderness, organomegaly, or other masses. No herniae.
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Approach to Abdominal Mass:
ACS Surgery, 2006.
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Laboratory Studies:
▪ Normal CBC▪ Normal Chemistry Panel▪ Normal Liver Function Tests
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Initial Assessment & Plan:
▪ 66 y.o. male with CAD, tubulovillous adenoma, and palpable abdominal mass▸ 1) Follow up with cardiac evaluation▸ 2) Imaging to characterize palpable abdominal mass▸ 3) Plan surgical removal of polyp
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Follow-up studies: CAD
▪ Stress Thalium: Reversible inferolateral defect. Ejection fraction 61%. ▪ Cardiac cath: 2 stents placed▪ Cardiology Recommendations
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Follow-up Studies: CT Abdomen
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Follow-up Studies: CT Abdomen
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Retroperitoneal Mass: Differential Diagnosis
• Lymphangioma• Lipoma/fibroma• Leiomyoma• Adrenal Adenoma• Nephrogenic cyst• Retroperitoneal cyst• Pheochromocytoma• Hematoma
• Sarcoma• Germ cell neoplasm• Lymphoma• Extension of primary
tumor (renal, adrenal, colon, pancreatic)
Feig BW. Surg Oncol Clin N Am 12:369, 2003.
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Pre-op Work-up, Summary:
▪ 66 y.o. male with CAD, status-post stentplacement x 2▪ 4-cm Tubulovillous adenoma▪ Large, right-sided, retroperitoneal, fatty tumor (Lipoma vs liposarcoma)
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Referral To Tertiary Care Center
▪ Percutaneous biopsy? ▪ Colon resection with intra-operative biopsy?▪ Colon Resection along with tumor resection?▸ En-bloc resection vs preservation of kidney?
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Operative Therapy: Exploratory Laparotomy...
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Pathology:
▪ Retroperitoneal Tumor:▪ 25 x 15 x 10 cm▸ Well-differentiated liposarcoma▸ Microscopic extension to surgical margins
▪ Polyp:▸ Tubulovillous Adenoma with focal high-grade dysplasia▸ Negative margins
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Post-operative Course:
▪ Uneventful Recovery▪ Discharge Home Postoperative day 7
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Retroperitoneal Sarcomas: Epidemiology
▪ 15% of all soft tissue sarcomas▪ Peak incidence age 60▪ Risk Factors: ▸ Li Fraumeni Syndrome, Von Recklinhausendisease, Gardner Syndrome▸ History of irradiationLewis JJ, et al. Ann Surg 228:355, 1998.Feig BW. Surg Oncol Clin N Am 12:369, 2003.
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Retroperitoneal Sarcomas: Presentation
▪ Abdominal pain 40-60%▪ Neurologic symptoms 30%▪ Weight loss 15% ▪ Early satiety < 10%▪ Nausea, vomiting < 10%▪ Lower extremity swelling < 10%
Feig BW. Surg Oncol Clin N Am 12:369, 2003.
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Retroperitoneal Sarcomas: Evaluation
▪ Helical Abdominal CT▪ Serum AFP, Beta HCG▪ Testicular U/S▪ Core Needle Biopsy if: ▸ Germ cell neoplasm suspected▸ Lymphoma suspected▸ Neoadjuvant tx contemplated
▪ CXRFeig BW. Surg Oncol Clin N Am 12:369, 2003.
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Retroperitoneal Sarcomas: Adjuvant Therapy
▪ Adjuvant Radiation Therapy:▸ Conflicting results for local recurrence, retrospective studies▸ Possible role for intra-op + post-op XRT (one RCT)
▪ Adjuvant Chemotherapy: No proven benefit▪ Neoadjuvant Chemotherapy (doxorubicin, ifosfamide) under investigationFeig BW. Surg Oncol Clin N Am 12:369, 2003.
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Retroperitoneal Sarcomas: Surgery
▪ Primary therapy▪ Best outcomes with margin-free resections▪ En bloc resection of adjacent organs in 53-83%
Lewis JJ, et al. Ann Surg 228:355, 1998.Feig BW. Surg Oncol Clin N Am 12:369, 2003.
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Retroperitoneal Sarcomas: Outcomes
▪ Median Survival: ▸ Resected primary disease: 72 mo▸ Resected recurrent: 28 mo▸ Metastases: 10 mo
▪ Survival after grossly incomplete resection equivalent to unresectable disease
Lewis JJ, et al. Ann Surg 228:355, 1998.Feig BW. Surg Oncol Clin N Am 12:369, 2003.
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Retroperitoneal Sarcoma Outcomes: Relative Risks▪ Death:
▸ High-grade 3.2-5.4▸ + gross margin 4-5▸ Unresectability 4.7
▪ Local recurrence:▸ High-grade 2.0▸ Liposarcoma 2.6
▪ Metastasis:▸ High-grade 5.0▸ + gross margin 3.9▸ Liposarcoma 0.2
Grobmyer SR, Brennan MF. Curr Opin Oncol. 15:319:2003.
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References:
Feig BW. Retroperitoneal sarcomas. Surg Oncol Clin N Am 2003;12:369-377.
Grobmyer SR, Brennan MF. Predictive variables detailing the recurrence rate of soft tissue sarcomas. Curr Opin Oncol 2003;15:319-326.
Lewis JJ, LeungD, Woodruff JM, Brennan ME. Retroperitoneal sarcoma: analysis of 500 patients treated and followed at a single institution. Ann Surg 1998;228:355-65.