A 42-year-old woman with a history of cervical intraepithelial neoplasia (CIN) 3 treated with loop electrosurgical excision procedure (LEEP) 5 years ago presents with vaginal bleeding and pelvic pain. HPV testing is positive for HPV-16. Pap smear shows atypical squamous cells of undetermined significance (ASCUS). Colposcopy with directed biopsy reveals invasive squamous cell carcinoma of the cervix, FIGO stage IB1. She is counseled about treatment options. Which of the following is the most appropriate first-line definitive treatment for this patient?

Explanation

## Cervical Cancer Stage IB1: Surgical vs. Radiotherapy For **FIGO stage IB1 cervical cancer** (tumor ≤4 cm confined to cervix), **radical hysterectomy with bilateral pelvic lymphadenectomy** is the gold-standard first-line definitive treatment in eligible candidates. ### Key Points: **Surgical Candidacy:** - Patient is 42 years old, good performance status, no contraindications mentioned - Stage IB1 tumors are ideally suited for primary surgical management - Radical hysterectomy (Wertheim hysterectomy) removes the uterus, parametria, and upper vagina - Bilateral pelvic lymphadenectomy (pelvic node dissection) is essential for staging and prognosis **Why Surgery over Radiotherapy:** - Surgery preserves ovarian function in premenopausal women (ovarian transposition can be done) - Avoids late radiation toxicity (bowel, bladder, vaginal stenosis) - Allows pathological assessment of lymph nodes and margins - Equivalent oncologic outcomes to CCRT for stage IB1 in surgical candidates **Role of CCRT:** - Reserved for **stage IB2** (>4 cm) or **stage IIA–IVA** (parametrial/distant spread) - Also used if high-risk features found on final pathology (positive margins, positive nodes, deep stromal invasion, lymphovascular invasion) - May be used in medically unfit patients for surgery **Neoadjuvant Chemotherapy:** - Not standard first-line; reserved for select cases with bulky stage IB2 or IIA disease to downstage before surgery - No survival benefit over primary CCRT or surgery alone for IB1 **Brachytherapy Alone:** - Incomplete treatment; must be combined with EBRT if radiotherapy is chosen - Not used as monotherapy for invasive cancer ## Clinical Pearl: **For stage IB1 cervical cancer in a young, fit woman: Surgery is preferred over CCRT** to preserve ovarian and sexual function. CCRT becomes standard if nodes are positive or other high-risk features emerge on pathology. ## High-Yield Mnemonic: **"IB1 → Surgery; IB2 → CCRT"** (if surgical candidate available)