A 42-year-old woman from rural Maharashtra presents with postmenopausal bleeding and vaginal discharge for 3 months. On speculum examination, a friable cervical lesion is noted. Pap smear shows atypical squamous cells of undetermined significance (ASCUS). What is the investigation of choice to confirm the diagnosis of cervical cancer?

Explanation

## Investigation of Choice for Cervical Cancer Confirmation **Key Point:** Colposcopy with cervical biopsy is the gold standard for histological confirmation of cervical cancer when a visible cervical lesion is present on clinical examination. ### Diagnostic Algorithm ```mermaid flowchart TD A[Visible cervical lesion on speculum]:::outcome --> B{Biopsy needed?}:::decision B -->|Yes| C[Colposcopy with directed biopsy]:::action C --> D[Histological diagnosis]:::outcome E[ASCUS on Pap smear] --> F{Visible lesion?}:::decision F -->|Yes| C F -->|No| G[HPV reflex testing or repeat cytology]:::action ``` ### Why Colposcopy with Biopsy? 1. **Magnified visualization** — Colposcope (×10–×40 magnification) allows precise identification of abnormal vasculature and epithelial changes. 2. **Directed tissue sampling** — Biopsy from the most suspicious area ensures maximum diagnostic yield. 3. **Histological confirmation** — Only tissue diagnosis can confirm invasive cervical cancer and grade the lesion. 4. **Staging information** — Biopsy depth assessment helps determine if invasion is present. **High-Yield:** When a gross cervical lesion is visible, skip cytology and HPV testing — proceed directly to colposcopy with biopsy for tissue diagnosis [cite:FIGO Cervical Cancer Guidelines]. **Clinical Pearl:** The presence of a friable, bleeding cervical mass on speculum examination is highly suspicious for invasive cancer and mandates immediate tissue diagnosis, not further cytological screening. ### Role of Other Investigations | Investigation | Indication | Limitation | |---|---|---| | HPV DNA testing | ASCUS with no visible lesion; screening | Cannot diagnose cancer; requires cytology correlation | | Cone biopsy | Therapeutic + diagnostic; margin assessment | Invasive; reserved for treatment, not initial diagnosis | | Endocervical curettage | Endocervical involvement assessment | Does not visualize lesion; lower sensitivity for gross disease |