Vulvar and Vaginal Cancer

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Vulvar Cancer - Vulva's Vicious Lesions

  • Primarily affects postmenopausal women (peak age 65-75 years).
  • Risk Factors:
    • HPV infection (types 16, 18, 31): Younger women; warty/basaloid SCC; associated with Vulvar Intraepithelial Neoplasia (VIN).
    • Chronic vulvar dermatoses (e.g., lichen sclerosus): Older women; keratinizing SCC.
    • Smoking, immunosuppression, history of cervical cancer.
  • Histopathology:
    • Squamous Cell Carcinoma (SCC): >90%; keratinizing type is most common overall.
    • Melanoma: ~5%; second most common.
    • Others: Adenocarcinoma (e.g., Bartholin gland), sarcoma.
  • Clinical Features:
    • Persistent vulvar pruritus (most common symptom).
    • Visible lesion: lump, ulcer, plaque (red, white, or pigmented).
    • Pain, bleeding, or discharge.
  • Diagnosis: Full-thickness biopsy (e.g., Keyes punch biopsy) of any suspicious lesion is mandatory. Vulvar squamous cell carcinoma clinical views

⭐ The labia majora is the most common site for vulvar cancer development.

Vulvar Cancer Staging & Management - Staging Showdown & Tactics

  • FIGO Staging (Simplified):
    • Stage I: Tumor confined to vulva/perineum.
      • IA: ≤2cm, stromal invasion ≤1mm.
      • IB: >2cm or stromal invasion >1mm.
    • Stage II: Any size, extends to lower 1/3 urethra, lower 1/3 vagina, anus.
    • Stage III: Regional LN metastasis.
      • IIIA: 1-2 LNs (<5mm) OR 1 LN (≥5mm).
      • IIIB: ≥3 LNs (<5mm) OR ≥2 LNs (≥5mm).
      • IIIC: Extracapsular spread in LNs.
    • Stage IV:
      • IVA: Invades upper urethra/vagina, bladder/rectal mucosa, or fixed to bone.
      • IVB: Distant metastasis.
  • Lymphatics: Superficial inguinal → Deep inguinal (Cloquet's node) → Pelvic.
  • Management Overview:
    • Early (IA, IB, select II): Surgery: Wide Local Excision (WLE)/Radical Vulvectomy ± Sentinel LN Biopsy (SLNB)/Inguinofemoral LND.
    • Advanced (some II, III, IVA): Multimodal: Surgery, Radiotherapy (RT), Chemotherapy (Chemo) (neoadjuvant/adjuvant).
    • Metastatic (IVB): Palliative RT/Chemo.

FIGO Stage III Vulvar Cancer Staging

⭐ For unifocal vulvar tumors <4cm with clinically negative groin nodes, sentinel lymph node biopsy (SLNB) is preferred over full inguinofemoral lymphadenectomy to reduce lymphedema risk and surgical morbidity.

Vaginal Cancer - Vagina's Veiled Threat

  • Rare (1-2% of gynecologic malignancies); often metastatic.
  • Risk Factors:
    • HPV infection (types 16, 18): Most common.
    • In-utero DES exposure: Risk for Clear Cell Adenocarcinoma.
    • History of cervical/vulvar cancer or dysplasia.
    • Immunosuppression, smoking, prior pelvic radiation.
  • Histopathology:
    • Squamous Cell Carcinoma (SCC): ~85%; typically upper 1/3, posterior wall.
    • Adenocarcinoma: ~10%; includes Clear Cell (DES-related) and non-DES types.
    • Melanoma: Rare, aggressive; lower 1/3, anterior wall.
    • Sarcoma Botryoides (Embryonal Rhabdomyosarcoma): Infants/children <5 yrs; grape-like clusters. 📌 "Botryoides = Bunch of grapes"
  • Clinical Presentation: Abnormal vaginal bleeding (postmenopausal, postcoital), watery/malodorous discharge, vaginal mass; late: pain, urinary/rectal symptoms.
  • Diagnosis: Pelvic exam, Pap smear (may detect), colposcopy with directed biopsy.
  • Staging: FIGO clinical staging.

⭐ Diethylstilbestrol (DES) exposure in utero is classically linked to Clear Cell Adenocarcinoma of the vagina, typically in young women (late teens to early 20s).

Vaginal Cancer Staging & Management - Grading Game & Guidance

  • FIGO Clinical Staging (Simplified)
    • Stage I: Tumor confined to vaginal wall.
    • Stage II: Tumor invades paravaginal tissues, not to pelvic wall.
    • Stage III: Tumor extends to pelvic wall and/or causes hydronephrosis/non-functioning kidney.
    • Stage IVA: Tumor invades mucosa of bladder/rectum OR extends beyond true pelvis.
    • Stage IVB: Distant metastasis.
  • Lymphatic Drainage
    • Upper ⅔ vagina → Pelvic nodes (obturator, internal/external iliac).
    • Lower ⅓ vagina → Inguinofemoral nodes.
    • 📌 Upper to Pelvic; Lower to Inguinal.
  • Management Principles
    • Early (Stage I, select IIA): Surgery (radical vaginectomy + LND) or definitive RT.
    • Advanced (most Stage II, III, IVA): Primary RT (EBRT + Brachytherapy) ± concurrent Cisplatin.
    • Stage IVB: Palliative therapy (RT/Chemo).
  • Histologic Grade: G1 (well-differentiated) to G3 (poorly-differentiated) impacts prognosis. Lymphatic drainage of female reproductive organs

⭐ Vaginal intraepithelial neoplasia (VaIN) is a precursor lesion; SCC is the most common type (~85%).

High‑Yield Points - ⚡ Biggest Takeaways

  • Vulvar Cancer: Mostly SCC; HPV (younger), lichen sclerosus (older). Key: persistent pruritus. Diagnosis: biopsy. Staging: surgical (FIGO).
  • Vaginal Cancer: Mostly SCC, HPV-related. Common site: upper posterior wall. Diagnosis: biopsy. Staging: clinical (FIGO).
  • Paget's Disease (Vulva): Intraepithelial adenocarcinoma; presents as red, eczematoid, pruritic lesion.
  • DES Exposure: Linked to clear cell adenocarcinoma of vagina/cervix.
  • Sarcoma Botryoides: Grape-like vaginal mass in infants/young girls (< 5 yrs).
  • Vulvar Lymphatics: Spread to inguinofemoral nodes first; sentinel node biopsy important for early stages.

Practice Questions: Vulvar and Vaginal Cancer

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Flashcards: Vulvar and Vaginal Cancer

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Stage III vulval cancers can be treated by _____ + local sx excision

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Stage III vulval cancers can be treated by _____ + local sx excision

megavoltage radiotherapy

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