**Question:** A 55-year-old woman is diagnosed with invasive cervical carcinoma by cone biopsy. Pelvic examination and rectal examination reveal the parametrium is free of disease but the upper part of the vagina is involved with tumor. IVP and sigmoidoscopy are negative but CT Scan of the abdomen and pelvis shows grossly enlarged pelvic and para-aortic nodes. Thus, the patient is classified as stage.

A. I.
B. II.
C. III.
D. IV.

**Core Concept:** Staging of cervical cancer is essential for determining treatment options and predicting prognosis. Staging is based on the extent of tumor spread according to the International Federation of Gynecology and Obstetrics (FIGO) classification system.

**Why the Correct Answer is Right:** The correct answer (stage D) is determined based on the presence of distant organ involvement (para-aortic lymph nodes) and/or spread beyond the pelvis. In this case, the tumor has spread to the para-aortic lymph nodes, which is considered distant organ involvement.

**Why Each Wrong Option is Incorrect:**

A. I. Stage I: This stage is characterized by tumor confined to the cervix only. In this case, the tumor has spread to the para-aortic lymph nodes, making it stage D.
B. II. Stage II: This stage involves tumor extension to the parametrium, uterine corpus, or both. In this case, the tumor has spread beyond the parametrium, so this option is incorrect.
C. III. Stage III: This stage involves tumor extension to the vagina or involvement of rectosigmoid colon, rectum, or both. In this case, there is no involvement of the vagina or rectosigmoid colon, rectum, so this option is incorrect.
D. IV. Stage IV: This stage involves distant organ invasion or distant lymph node involvement. In this case, the tumor has spread to the para-aortic lymph nodes, which is considered distant organ involvement, making it stage D.

**Clinical Pearls:**

1. For cervical cancer staging, combined clinical, histopathological, and radiological evaluation is crucial.
2. The FIGO staging system is widely accepted and used for cervical cancer staging to guide treatment decisions and predict prognosis.
3. Distant organ involvement, such as para-aortic lymph node involvement in this case, indicates poor prognosis and warrants more aggressive treatment options like chemotherapy or radiation therapy in addition to surgery.