| Preface | 5 |
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| Contents | 6 |
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| Contributors | 11 |
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| 1. Anatomy and Embryology of the Colon, Rectum, and Anus | 25 |
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| A. Anatomy | 25 |
| B. Embryology | 47 |
| 2. Physiology: Colonic | 54 |
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| A. Colonic Function | 54 |
| B. Colonic Motility | 56 |
| C. Defecation and Colonic Sensation | 58 |
| D. Disturbances in Colonic Physiology | 59 |
| E. Implications of Colonic Physiology for the Surgeon | 61 |
| 3. Anal Physiology | 63 |
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| A. Introduction | 63 |
| B. Pelvic Floor Muscles | 63 |
| C. Reflexes | 64 |
| D. Mechanical Factors of Continence and Defecation | 66 |
| E. Pathologic Conditions | 68 |
| F. Continence | 69 |
| 4. Physiologic Testing | 71 |
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| A. Introduction | 71 |
| B. Manometry | 71 |
| C. Defecography | 83 |
| D. Balloon Expulsion Test | 87 |
| E. Anal Ultrasound | 87 |
| F. Magnetic Resonance Imaging | 88 |
| G. EMG of the Anal Sphincter | 89 |
| H. Evaluation of Transit | 91 |
| 5. Diagnostic Evaluations: Endoscopy: Rigid, Flexible Complications | 94 |
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| A. Anoscopy | 94 |
| B. Rigid Proctosigmoidoscope | 99 |
| C. Flexible Sigmoidoscopy | 101 |
| D. Ileoscopy | 103 |
| E. Pouchoscopy | 104 |
| F. Colonoscopy | 105 |
| 6. Diagnostic Evaluations: Radiology, Nuclear Scans, PET, CT Colography | 113 |
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| A. Plain Films | 113 |
| B. Contrast Studies | 121 |
| C. Computed Tomography | 133 |
| D. Radionuclide Imaging | 143 |
| E. Arteriography | 145 |
| F. CT Colonography | 146 |
| G. Positron Emission Tomography (PET) | 149 |
| H. Magnetic Resonance Imaging (MRI) | 152 |
| 7. Endoluminal Ultrasound | 154 |
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| A. Introduction | 154 |
| B. Endoanal Ultrasound | 166 |
| 8. Preoperative Management: Risk Assessment, Medical Evaluation, and Bowel Preparation | 177 |
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| A. Perioperative Risk Assessment Scoring Systems | 177 |
| B. Preoperative Medical Evaluation | 183 |
| C. Bowel Preparation | 190 |
| D. Prophylactic Antibiotic Usage ( See Appendix 2) | 193 |
| E. Prophylaxis for Endocarditis and Prosthesis | 194 |
| F. Communication with the Patient and Laying the Groundwork for Postoperative Recovery | 194 |
| G. Conclusion | 194 |
| Appendix 1: Practice Parameters for the Prevention of Venous Thromboembolism | 195 |
| Appendix 2: Practice Parameters for Antibiotic Prophylaxis to Prevent Infective Endocarditis or Infective Prosthesis During Colon and Rectal Endoscopy | 196 |
| 9. Postoperative Management: Pain and Anesthetic, Fluids and Diet | 199 |
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| A. Pain Control | 199 |
| B. Perioperative Fluid Management | 205 |
| C. Ulcer Prophylaxis | 205 |
| D. DVT Prophylaxis | 207 |
| E. Duration | 210 |
| F. Anticoagulation | 211 |
| G. Diet | 211 |
| H. Steroids | 213 |
| I. Clinical Pathways | 215 |
| 10. Postoperative Complications | 216 |
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| A. Unrecognized Enterotomies and Enterocutaneous Fistulae | 216 |
| B. Anastomotic Complications | 218 |
| C. Genitourinary Complications | 224 |
| D. Pelvic Bleeding | 236 |
| 11. Benign Anorectal: Hemorrhoids | 241 |
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| A. Anatomy | 241 |
| B. Etiology | 243 |
| C. Epidemiology | 244 |
| D. Classification | 244 |
| E. Symptoms | 244 |
| F. Differential Diagnosis | 246 |
| G. Examination | 248 |
| H. Treatment | 249 |
| I. Strangulated Hemorrhoids | 267 |
| J. Hemorrhoids, Varices, and Portal Hypertension | 268 |
| K. Hemorrhoids in Pregnancy | 268 |
| L. Hemorrhoids and Crohn’s Disease | 269 |
| M. Hemorrhoids and the Immunocompromised | 269 |
| N. Posthemorrhoidectomy Hemorrhage | 269 |
| Appendix: Practice Parameters for Ambulatory Anorectal Surgery | 270 |
| Ambulatory Facilities | 270 |
| Preoperative Evaluation | 271 |
| Intraoperative Considerations | 272 |
| Postoperative Considerations | 272 |
| 12. Benign Anorectal: Anal Fissure | 274 |
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| A. Epidemiology | 274 |
| B. Etiology | 274 |
| C. Symptoms | 276 |
| D. Diagnosis | 276 |
| E. Management | 277 |
| F. Special Situations | 286 |
| 13. Benign Anorectal: Abscess and Fistula | 288 |
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| A. Introduction | 288 |
| B. Abscess | 288 |
| C. Fistula-in-Ano | 301 |
| D. Rectourethral Fistulas | 319 |
| Appendix: Practice Parameters for Treatment of Fistula- in- Ano | 321 |
| Acute Suppuration (Abscess) | 321 |
| Chronic Suppuration (Fistula) | 322 |
| Special Considerations | 323 |
| 14. Benign Anorectal: Rectovaginal Fistulas | 325 |
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| A. Etiology | 325 |
| B. Evaluation | 326 |
| C. Classification | 327 |
| D. Conservative Management | 328 |
| E. Surgical Techniques | 328 |
| Choice of Treatment | 333 |
| 15. Pilonidal Disease and Hidradenitis Suppurativa | 338 |
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| A. Pilonidal Disease | 338 |
| B. Hidradenitis Suppurativa | 351 |
| 16. Perianal Dermatology and Pruritus Ani | 356 |
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| A. Introduction | 356 |
| B. Definitions | 356 |
| C. Physiologic Considerations | 358 |
| D. Etiology of Pruritus | 359 |
| E. Diagnosis of Perianal Disease | 365 |
| F. Treatment of Pruritus Ani | 369 |
| 17. Sexually Transmitted Diseases | 375 |
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| A. Introduction | 375 |
| B. Overview of Anorectal Immunology | 376 |
| C. Diagnosis and Management of Bacterial Pathogens | 377 |