Cervical Cancer

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Epi & Risks - Cervix Culprits

  • Global: 4th commonest female cancer; India: 2nd, ~20% global burden.
  • Main Culprit: Persistent high-risk HPV (hrHPV) - types 16 & 18 (most oncogenic).
  • Key Cofactors:
    • Early coitarche (<18 yrs), multiple sexual partners.
    • Smoking, immunosuppression (e.g., HIV).
    • OCP use >5 yrs, multiparity.
    • Low socioeconomic status.

⭐ HPV types 16 and 18 account for approximately 70% of all cervical cancers worldwide.

Patho & HPV - Viral Villainy

HPV E6/E7 oncoproteins and cellular deregulation

  • High-risk HPV: Types 16 (SCC), 18 (AdenoCa) are key.
  • Viral Oncoproteins:
    • E6 → degrades p53 (tumor suppressor).
    • E7 → inhibits Rb (retinoblastoma protein).
  • Mechanism: ↓p53 & ↓Rb function → ↑cell proliferation → neoplasia.
  • Progression: CIN (Cervical Intraepithelial Neoplasia) → Invasive Carcinoma.
  • Histotypes: Squamous Cell Carcinoma (SCC, 75%), Adenocarcinoma (20%).

⭐ HPV 16 is the most oncogenic type, strongly associated with Squamous Cell Carcinoma (SCC).

Screening & Prevention - Guarding the Gateway

  • Screening (India: Age 30-65 yrs):
    • Pap Smear: q3-5 yrs.
    • HPV DNA Test (hrHPV 16,18): Primary/Co-test q5 yrs.
    • VIA/VILI: q5 yrs (low-resource).
  • Abnormal: Colposcopy & Biopsy.
  • HPV Vaccination (Prophylactic, 9-26 yrs):
    • Types: Bivalent (HPV 16,18); Quadrivalent (+6,11); Nonavalent (+HPV 31,33,45,52,58).
    • Schedule: 2 doses (9-14y); 3 doses (≥15y).

    ⭐ HPV types 16 & 18 cause ~70% of cervical cancers; prophylactic vaccination is key for primary prevention.

Symptoms & Dx - Spotting the Signs

  • Symptoms:
    • Post-coital bleeding (PCB) - most common
    • Intermenstrual or postmenopausal bleeding
    • Foul-smelling vaginal discharge
    • Pelvic/back pain, dyspareunia (late signs)
  • Diagnosis:
    • Speculum exam: Visible cervical lesion (growth, ulcer)
    • Punch biopsy: Confirmatory histopathology
    • Staging: MRI (local spread), CT/PET-CT (metastasis) Cervical Cancer Appearance

⭐ Post-coital bleeding is the most frequent early symptom of cervical cancer.

FIGO Staging - Cancer Cartography

  • FIGO 2018/2019: Clinical staging.
  • Stage I: Confined to cervix.
    • IA: Microscopic. IB: Clinically visible.
  • Stage II: Beyond uterus; not pelvic wall/lower vagina.
    • IIA: No parametrial. IIB: Parametrial.
  • Stage III: Pelvic wall, lower vagina, hydronephrosis, or LNs.
    • IIIC: Nodal mets (IIIC1: Pelvic; IIIC2: Para-aortic).
  • Stage IV: Beyond true pelvis or bladder/rectal mucosa.
    • IVA: Adjacent. IVB: Distant. FIGO 2018 Cervical Cancer Staging Summary

⭐ FIGO 2018 allows imaging/pathology for nodal status (Stage IIIC).

Treatment Tactics - Battling Back

  • CIN/AIS: LEEP/Cone biopsy.
  • Stage IA1: Cone biopsy or simple hysterectomy.
  • Stage IA2, IB1, IB2 (tumor ≤4cm): Radical hysterectomy + LND OR primary RT/CRT.
  • Stage IB3 (tumor >4cm), IIA (tumor >4cm), IIB-IVA (Locally Advanced): Definitive Chemoradiation (CRT).
    • Cisplatin-based chemo.
  • Stage IVB/Recurrent: Palliative CT/RT, immunotherapy (e.g., Pembrolizumab if PD-L1+).

⭐ For locally advanced cervical cancer (FIGO stages IB3 to IVA), concurrent chemoradiation (CRT) with weekly Cisplatin is the standard, improving survival over radiation alone.

High‑Yield Points - ⚡ Biggest Takeaways

  • Persistent HPV infection (esp. types 16, 18) is the primary etiological factor.
  • Screening via Pap smear and HPV DNA testing is crucial for early detection.
  • Most common type: Squamous Cell Carcinoma (SCC); adenocarcinoma is second.
  • Key symptom: Post-coital bleeding. Other symptoms: intermenstrual/post-menopausal bleeding, foul discharge.
  • FIGO staging is clinical, not primarily surgical, guiding treatment.
  • Treatment depends on stage: surgery (e.g., hysterectomy) for early, chemoradiation for advanced disease.
  • HPV vaccination offers effective primary prevention against oncogenic types.

Practice Questions: Cervical Cancer

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Management of stage IIB cancer of the cervix is?

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Flashcards: Cervical Cancer

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Buzz word for HPV _____ cancer: post-coital bleeding

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Buzz word for HPV _____ cancer: post-coital bleeding

cervical

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