**Core Concept**
In cervical cancer, metastatic spread typically follows a specific anatomical pattern, with lymphatic drainage beginning in the **paracervical or ureteral nodes** located immediately adjacent to the cervix. These nodes are the first to receive lymphatic drainage from the cervix and are therefore the initial site of metastasis beyond the cervix and uterus.

**Why the Correct Answer is Right**
The paracervical (or ureteral) nodes lie directly around the cervix and are the **first lymphatic drainage site** for cervical tissue. Due to their anatomical proximity, they are the **first to be involved** in lymphatic metastasis, which occurs before involvement of deeper or more distant nodes. This pattern is well-documented in clinical oncology and is critical for staging and treatment planning.

**Why Each Wrong Option is Incorrect**
Option A: The common iliac nodes are located distal to the pelvic lymphatics and are involved **later** in the disease process, not initially.
Option B: Parametrial nodes are **not** the first to be involved; they are part of the regional lymphatic chain but develop metastasis **after** paracervical nodes.
Option C: The external iliac nodes receive lymph from the lower limbs and pelvic structures but are **not** the primary first site of cervical lymphatic spread.

**Clinical Pearl / High-Yield Fact**
In cervical cancer, **paracervical nodes** are the **first** lymph nodes to show metastasis—this is a key point in staging (e.g., FIGO stage) and helps differentiate early from advanced disease. Always remember: **"Metastasis starts at the cervix, not the pelvis."**

✓ Correct Answer: D. Paracervical or ureteral nodes