Which area does NOT have lymph nodes?

NHM UP Staff Nurse-2023 Shift-2nd

Applied Anatomy

Easy

Appeared in: NHM UP Staff Nurse-2023 Shift-2nd

Explanation

The spinal cord is part of the Central Nervous System (CNS), which is traditionally considered an immunologically privileged site and lacks a conventional lymphatic system with lymph nodes.
While the body has an extensive network of lymph vessels and nodes for immune surveillance and fluid balance, certain specialized tissues are exceptions.
Other avascular or specialized tissues that lack lymph nodes include the cornea of the eye, cartilage, the epidermis, and bone marrow.

Option B: The stomach has a rich and complex network of gastric and perigastric lymph nodes that drain the organ.
Option C: The neck is one of the most well-known locations for lymph nodes, containing the superficial and deep cervical chains, which are frequently assessed during physical examinations.
Option D: The lungs are drained by a network of pulmonary and bronchopulmonary (hilar) lymph nodes, which are essential for respiratory immune defense.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Anatomy of the lymphatic system and the distribution of lymph nodes within the human body as background academic context rather than a clinical decision trigger.
Understanding the location of lymph nodes is vital for nurses in physical assessment, particularly when checking for lymphadenopathy (swollen nodes), which can indicate infection, inflammation, or malignancy.
In oncology nursing, the pattern of lymph node involvement is a key factor in staging cancer and determining prognosis and treatment, as cancer cells often metastasize via the lymphatic system.
What if a patient presents with a persistent cough and is diagnosed with lung cancer? The nurse would anticipate that the patient's diagnostic workup will include imaging and possibly biopsy of the hilar and mediastinal lymph nodes to check for cancer spread.

How to Approach the Question

First, identify the negative keyword 'NOT' in the question stem. This is a critical instruction, meaning you are searching for the one option that is an exception.
The question asks which area lacks lymph nodes. This is a direct recall question about the anatomy of the lymphatic system.
Systematically evaluate each option. Think about common medical knowledge. You have likely heard of 'swollen glands in the neck' during an infection, which are cervical lymph nodes.
Recall that the Central Nervous System (brain and spinal cord) is considered an 'immunologically privileged' site, meaning it is separated from the rest of the body's immune system and lacks a traditional lymphatic drainage system.
The stomach and lungs are major internal organs that are constantly exposed to foreign substances and require robust immune surveillance, which includes extensive lymphatic networks.
Based on this elimination process, the spinal cord is the only plausible answer that does not have a conventional system of lymph nodes.

Concept Tested & Keywords

Concept Tested: Anatomy of the lymphatic system and the distribution of lymph nodes within the human body.
Stem keywords: lymph nodes, area
Lead-in keywords: NOT
Negative lead-in flag: Question asks for the area that does NOT have lymph nodes.

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E6 Physiology Essentials Sembulingam 10e Part 1 p. 161-163

E6 Anatomy Applied Ashalatha 4e pp. 199-201, 207-209