Advanced Pelvic Lymph Nodes Quiz

Q1. Why are obturator nodes often grouped clinically with internal iliac pelvic nodes?

• They lie in the axilla beside the axillary artery
• They occupy an obturator vascular pathway within the internal iliac drainage territory
• They lie beside the trachea in the superior mediastinum
• They surround the popliteal vessels behind the knee

Q2. Which anatomical principle helps predict many pelvic lymphatic drainage pathways?

• All pelvic lymphatics immediately cross the midline
• Lymphatics travel only with somatic motor nerves
• Lymphatics never follow blood vessels
• Lymphatics commonly accompany vascular pathways

Q3. Why can pelvic cancer staging require evaluation of multiple regional nodal groups?

• Lymphatic vessels prevent cellular transport
• Pelvic organs can have multiple communicating drainage pathways
• Pelvic organs have no regional lymph nodes
• All pelvic tumors spread first to axillary nodes

Q4. Which major pelvic nodal group is the most superior before lymph continues to lumbar nodes?

• Sacral nodes
• Obturator nodes
• Internal iliac nodes
• Common iliac nodes

Q5. How can the location of a lesion within a pelvic organ influence lymphatic spread?

• Different organ regions may drain to different nodal groups
• Lesion location affects arteries but never lymphatics
• All pelvic regions drain only to superficial inguinal nodes
• Every region of every pelvic organ drains to one identical node

Q6. Why are internal iliac nodes important during assessment of pelvic malignancies?

• They produce reproductive hormones
• They drain the upper limb
• They form the obturator membrane
• They receive lymph from several pelvic viscera

Q7. Why are common iliac nodes important in lymphatic spread beyond the pelvis?

• They connect pelvic nodes directly to axillary nodes
• They drain directly into the portal vein
• They form the inguinal ligament
• They connect pelvic nodal chains with lumbar nodes

Q8. Why may sacral nodes be involved in disease arising from posterior pelvic structures?

• Their position and connections include drainage from posterior pelvic territories
• They are located in the upper limb
• They lie in the anterior neck
• They drain only the scalp

Q9. Why is knowledge of pelvic nodal chains useful when interpreting cross sectional imaging?

• Pelvic lymph nodes cannot be assessed anatomically
• All pelvic nodes lie within the bladder wall
• Pelvic nodes have no relationship to vessels
• Pelvic nodal chains follow recognizable vascular territories

Q10. Which description best summarizes pelvic lymph node organization?

• A single isolated pelvic node draining into the portal vein
• A chain limited to superficial skin of the thigh
• A nodal system confined to the inguinal canal
• Interconnected iliac, obturator, and sacral groups draining toward lumbar nodes