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Cervical Cancer


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Cervical Cancer epidemiology, risk factors, staging and treatment

Published in: Health & Medicine

Cervical Cancer

  1. 1. Invasive Cervical Cancer Pedro T. Ramirez, M.D. Associate Professor Director of Minimally Invasive Research & Education Department of Gynecologic Oncology
  2. 2. Epidemiology <ul><li>Worldwide, cervical cancer is the second-leading cause of cancer mortality in women </li></ul><ul><li>Among the ~500,000 new cases each year, ~75% occur in developing countries </li></ul><ul><li>Cervical cytologic testing has reduced the incidence of cervical cancer by 70% in countries where it is easily available </li></ul>
  3. 3. Cervical Cancer and HPV <ul><li>Human papillomavirus (HPV) is central to cervical carcinogenesis </li></ul><ul><li>Worldwide, the prevalence of HPV in cervical tumors is 99.7% </li></ul><ul><li>High-risk HPV types include 16, 18, 31 and 41 </li></ul><ul><li>High-risk HPV infection is necessary but insufficient for cervical cancer </li></ul>
  4. 4. Additional Risk Factors <ul><li>Early onset sexual activity </li></ul><ul><li>Multiple sexual partners </li></ul><ul><li>High-risk sexual partner </li></ul><ul><li>History of a sexually transmitted infection </li></ul><ul><li>Immunosupression </li></ul><ul><li>Low socio-economic status </li></ul><ul><li>Previous history of vulvar, vaginal or cervical squamous dysplasia </li></ul>
  5. 5. Diagnosis of cervical cancer <ul><li>Cervical cytology (Pap smear) - results may suggest invasive cancer </li></ul><ul><li>Diagnosis must be confirmed by a biopsy </li></ul><ul><li>When a tumor is clinically evident, a biopsy is usually sufficient </li></ul><ul><li>If biopsy only shows intraepithelial disease or invasion is <3 mm, a cervical cone biopsy is indicated </li></ul>
  6. 7. Histologic Subtypes <ul><li>Squamous-Cell Carcinoma </li></ul><ul><ul><li>Keratinizing or Nonkeratinizing </li></ul></ul><ul><ul><li>Verrucous </li></ul></ul><ul><ul><li>Papillary transitional </li></ul></ul><ul><ul><li>Lymphoepithelioma-like </li></ul></ul><ul><li>Adenocarcinoma </li></ul><ul><ul><li>Mucinous </li></ul></ul><ul><ul><li>Endometrioid </li></ul></ul><ul><ul><li>Clear Cell </li></ul></ul><ul><ul><li>Serous </li></ul></ul><ul><ul><li>Mesonephric </li></ul></ul><ul><ul><li>Well differentiated villoglandular </li></ul></ul><ul><ul><li>Minimal deviation (adenoma malignum) </li></ul></ul><ul><li>Other epithelial </li></ul><ul><ul><li>Adenosquamous </li></ul></ul><ul><ul><li>Glassy Cell </li></ul></ul><ul><ul><li>Carcinoid Tumor </li></ul></ul><ul><ul><li>Neuroendocrine </li></ul></ul><ul><ul><li>Small-cell </li></ul></ul><ul><ul><li>Undifferentiated </li></ul></ul>
  7. 8. Patterns of Spread
  8. 9. Patterns of Spread <ul><li>Local Invasion </li></ul><ul><li>Lymphatic </li></ul><ul><ul><li>Risk relates to depth of invasion </li></ul></ul><ul><ul><li>Pelvic nodes before paraaortic or supraclavicular </li></ul></ul><ul><li>Hematogenous </li></ul><ul><ul><li>More likely in adenocarcinoma, neuroendocrine or small cell tumors </li></ul></ul><ul><li>Intraperitoneal </li></ul><ul><ul><li>Unknown incidence </li></ul></ul><ul><ul><li>Poor prognosis </li></ul></ul>
  9. 10. Cervical Cancer Staging <ul><li>The International Federation of Gynecology and Obstetrics (FIGO) staging system is exclusively based on clinical evaluation </li></ul><ul><li>This allows staging to occur in low resource settings </li></ul>
  10. 11. What are the symptoms of cervical cancer? <ul><li>Early stage disease: </li></ul><ul><li>Often no symptoms! </li></ul><ul><li>Vaginal discharge </li></ul><ul><li>Abnormal bleeding </li></ul><ul><ul><li>Post-coital bleeding </li></ul></ul><ul><ul><li>Abnormal menses </li></ul></ul><ul><ul><li>Post-menopausal bleeding </li></ul></ul><ul><li>Late stage disease: </li></ul><ul><li>Pelvic or lower back pain </li></ul><ul><li>Sciatica </li></ul><ul><li>Weight loss </li></ul><ul><li>Bowel or bladder fistula </li></ul>
  11. 12. How is cervical cancer staged? <ul><li>Physical exam </li></ul><ul><ul><li>Palpation and inspection of primary tumor </li></ul></ul><ul><ul><li>Palpation of groin and supraclavicular lymph nodes </li></ul></ul><ul><ul><li>Rectovaginal exam </li></ul></ul><ul><ul><li>Exam under anesthesia </li></ul></ul><ul><li>Diagnostic exam(s) </li></ul><ul><ul><li>Chest X-ray </li></ul></ul><ul><ul><li>Intravenous pyelogram (IVP) </li></ul></ul><ul><li>Procedures </li></ul><ul><ul><li>Conization </li></ul></ul><ul><ul><li>Cystoscopy </li></ul></ul><ul><ul><li>Proctosigmoidoscopy </li></ul></ul>
  12. 14. Imaging Modalities Prognosis- NOT Staging <ul><li>Computed Tomography (CT scan) </li></ul><ul><li>Magnetic Resonance Imaging (MRI) </li></ul><ul><ul><li>May help define extent of disease in cervix and parametria </li></ul></ul><ul><li>Positron Emission Tomography (PET) </li></ul><ul><ul><li>Superior for detecting metastatic disease compared to CT or MRI </li></ul></ul><ul><li>Surgical “Staging” </li></ul><ul><ul><li>The “gold standard” for lymph node evaluation </li></ul></ul>
  13. 15. Stage Determines Treatment <ul><li>Early Stage (I-IB1 [IB2-IIa]) </li></ul><ul><ul><li>Primary Surgery </li></ul></ul><ul><ul><li>Chemoradiation </li></ul></ul><ul><li>Locally Advanced(IB2-IVA) </li></ul><ul><ul><li>Primary Chemoradiation </li></ul></ul><ul><li>Disease with Distant Metastases (IVB) </li></ul><ul><ul><li>Systemic chemotherapy </li></ul></ul>
  14. 16. Treatment of Early Stage (I-IIA) <ul><li>SURGERY </li></ul><ul><li>Pros </li></ul><ul><ul><li>Preserves ovarian function </li></ul></ul><ul><ul><li>Opportunity for pathologic information </li></ul></ul><ul><ul><li>Preferred for women at risk for irradiation complications </li></ul></ul><ul><li>Cons </li></ul><ul><ul><li>Surgical morbidity and mortality </li></ul></ul><ul><ul><li>Risk of general anesthesia </li></ul></ul><ul><ul><li>Risk of bleeding/transfusion </li></ul></ul><ul><ul><li>Possibility of long-term bowel and bladder problems </li></ul></ul><ul><ul><li>Possible need for post-op XRT </li></ul></ul><ul><li>RADIATION THERAPY </li></ul><ul><li>Pros </li></ul><ul><ul><li>Avoids risks of surgical morbidity, blood loss/transfusion, general anesthesia </li></ul></ul><ul><ul><li>Allows for outpatient treatment </li></ul></ul><ul><li>Cons </li></ul><ul><ul><li>Permanent ovarian failure </li></ul></ul><ul><ul><li>Vaginal shortening and fibrosis </li></ul></ul><ul><ul><li>Possibility of long-term bowel and bladder problems </li></ul></ul><ul><ul><li>Risk of bladder or bowel fistula, or rectal stricture </li></ul></ul>
  15. 17. Surgical options for early stage cervical cancer Stage IA1 Stage IA2-IB1 (<2 cm) Fertility Preservation Stage IA2-IB1 and IIA Cervical conization (fertility-sparing) Abdominal Radical Trachelectomy and Lymphadenectomy Abdominal radical hysterectomy plus lymphadenectomy Simple hysterectomy Vaginal Radical Trachelectomy plus Laparoscopic Lymphadenectomy Radical Vaginal Hysterectomy plus laparoscopic or extraperitoneal lymphadenectomy Robotic Radical Trachelectomy plus Lymphadenectomy Laparoscopic assisted radical vaginal hysterectomy plus lymphadenectomy Total laparoscopic/robotic radical hysterectomy plus lymphadenectomy
  16. 18. Fertility Preserving Surgery
  17. 19. Cervical Cancer <ul><li>United States </li></ul><ul><li>Incidence 11,150 </li></ul><ul><li>Death rate 3,670 </li></ul><ul><li>Median age diagnosis 48 years </li></ul><ul><li>Cervical cancer <45years 43% </li></ul><ul><li>Birth rate increase (1990-2002): </li></ul><ul><li>Ages 35-39 31% </li></ul><ul><li>40-45 51% </li></ul>
  18. 20. Daniel Dargent Radical Vaginal Trachelectomy 1994
  19. 23. Surgical Specimen
  20. 24. Cervical Cancer Candidates for Radical Trachelectomy <ul><li>MSKCC 1985-2001 (N=435) </li></ul><ul><li>Criteria for eligibility: </li></ul><ul><li>Confirmed cervical cancer </li></ul><ul><li>Stage IA1 with LVSI, IA2-IB1 </li></ul><ul><li>Lesion <2 cm </li></ul><ul><li>No evidence of metastases </li></ul><ul><li>Limited endocervical involvement </li></ul><ul><li>Cervical length >2cm </li></ul><ul><li>Post conization 4-6 weeks </li></ul><ul><li>BMI < 35kg/m2 </li></ul><ul><li>Desire for future fertility </li></ul><ul><li>No evidence of impaired fertility </li></ul><ul><li>Sonoda Y Gynecol Oncol 2004;95:534-538 </li></ul>
  21. 25. 435 Radical hysterectomy 186 pts <40 yrs 249 pts >40 yrs 174 pts Eligible Histology 12 pts Ineligible Histology 98 pts <2 cm tumor 76 pts >2 cm tumor 8 pts Ineligible by stage 89 (48%) pts <40yrs Eligible 1 pts Ineligible by infertility
  22. 26. Radical Trachelectomy <ul><li>Obstetrical outcomes: </li></ul><ul><li>62% of pregnancies reach 3 rd trimester (65% term) </li></ul><ul><li>1 st trimester loss: 16-20% (Equal to general population) </li></ul><ul><li>2 nd trimester loss: 9% (4% in general population) </li></ul><ul><li>Fertility outcomes: </li></ul><ul><li>50-60% of women attempting will succeed spontaneously </li></ul>Plante M Gynecol Oncol 2008
  23. 27. Prognostic Factors <ul><li>Status of lymph nodes </li></ul><ul><li>Size of primary tumor </li></ul><ul><li>Depth of stromal invasion </li></ul><ul><li>+/- lymph-vascular space (LVSI) invasion </li></ul><ul><li>+/- parametrial extension </li></ul><ul><li>Histologic cell type </li></ul><ul><li>Close vaginal margins </li></ul>
  24. 28. + Lymph Node Metastases <ul><li>Most important prognostic factor is LN Status </li></ul>Stage % +Pelvic Nodes % + Para-aortic Nodes IA1 0 0 IA2 (3-5 mm) 4.8 <1.0 IB 16 2 IIA 25 11 III 45 30 IVA 55 40
  25. 31. Indications for Adjuvant Therapy <ul><li>Women with one or more of the findings below are considered to be at HIGH risk for recurrent disease </li></ul><ul><ul><li>Positive or close resection margins </li></ul></ul><ul><ul><li>Positive lymph nodes </li></ul></ul><ul><ul><li>Parametrial involvement </li></ul></ul>
  26. 32. Sedlis A, Bundy BN, Rotman MZ, et al. A randomized trial of pelvic radiation therapy versus no further therapy in selected patients with stage IB carcinoma of the cervix after radical hysterectomy and pelvic lymphadenectomy: a Gynecologic Oncology Study Group Study. Gynecologic Oncology 73:177, 177-83, (1999), Other Indications for postoperative XRT treatment (HIGH INTERMEDIATE RISK) LVSI Stromal Invasion Tumor Size Positive Deep 1/3 Any Positive Middle 1/3 > 2 cm Positive Superficial 1/3 > 5 cm Negative Deep or middle 1/3 > 4 cm
  27. 33. IIB-IVA (Locally Advanced) Cervical Cancer <ul><li>Radiation therapy </li></ul><ul><li>Addition of chemotherapy can reduce the risk of death by 30-50% </li></ul><ul><li>Recommended Tx: </li></ul><ul><ul><li>External beam radiation </li></ul></ul><ul><ul><li>Concurrent cisplatin (40mg/m 2 per week) </li></ul></ul><ul><ul><li>Intracavitary brachytherapy </li></ul></ul>
  28. 34. Post-treatment Follow Up <ul><li>Clinical Evaluation </li></ul><ul><ul><li>Review of symptoms, physical exam with attention to supraclavicular and inguinal lymph nodes, rectovaginal exam, abdominal exam, +/- cytology) </li></ul></ul><ul><ul><li>every 3 months for one year </li></ul></ul><ul><ul><li>every 4 months for one year </li></ul></ul><ul><ul><li>every 6 months for 3 years </li></ul></ul><ul><ul><li>annually </li></ul></ul><ul><li>Annual Chest X-Ray </li></ul><ul><li>Other studies only as clinically indicated </li></ul>
  29. 35. Incidence of Recurrence Fagundes, H. et al. Int J Radiat Oncol Biol Phys 1992; 24:197 Stage Local (Pelvic) Distant IA <1% 3% IB 10% 16% IIA 17% 31% IIB 23% 26% III 42% 39% IV 74% 75%
  30. 36. Recurrent or Metastatic (IVB) Cervical Cancer <ul><li>Rarely- recurrent disease can be cured </li></ul><ul><ul><li>Surgery for those previously irradiated </li></ul></ul><ul><ul><li>Radiation for those with previous surgery </li></ul></ul><ul><ul><li>Triad of symptoms: 1) ureteral obstruction (hydronephrosis); 2)sciatica; 3)lower extremity edema suggest sidewall involvement and surgery is NOT advised </li></ul></ul><ul><li>When curative surgery or XRT not possible- PALLIATION is the goal </li></ul><ul><ul><li>Chemotherapy </li></ul></ul><ul><ul><li>Clinical trials </li></ul></ul>
  31. 37. Pelvic Exenteration <ul><li>Anterior Pelvic Exenteration: </li></ul><ul><li>Pelvic reproductive organs </li></ul><ul><li>Bladder and distal ureters </li></ul><ul><li>Entire pelvic floor </li></ul><ul><li>Preservation of the rectum </li></ul>
  32. 38. Pelvic Exenteration <ul><li>Posterior Pelvic Exenteration: </li></ul><ul><li>Pelvic reproductive organs </li></ul><ul><li>Rectum and anus </li></ul><ul><li>Entire pelvic floor </li></ul><ul><li>Preservation of the bladder and the ureters </li></ul>
  33. 39. Pelvic Exenteration <ul><li>Reconstructive Phase: </li></ul><ul><li>Urostomy </li></ul><ul><li>Colostomy </li></ul><ul><li>Vaginal reconstruction </li></ul>
  34. 40. OPERATIVE TECHNIQUE Modified VRAM Flap Sood et al, Obstet Gynecol 2005 8 cm 1x6 cm skin graft Inferior epigastric artery Myocutaneous flap
  35. 41. Modified VRAM Flap
  36. 42. Prognosis in Recurrent Disease <ul><li>80% of recurrences occur within 2 years of primary </li></ul><ul><li>Depends on site of recurrence and ability to pursue potentially curative therapy </li></ul><ul><li>Overall, poor prognosis if curative therapy not possible </li></ul><ul><li>Favorable prognostic factors </li></ul><ul><ul><li>Localized, central pelvic recurrence </li></ul></ul><ul><ul><li>Disease-free interval >6 months </li></ul></ul><ul><ul><li>Size < 3cm </li></ul></ul><ul><ul><li>No sidewall fixation </li></ul></ul>
  37. 43. MD Anderson Cancer Center