NORCET 3 - 2022 (Shif…: 'Setting sun' sign is a classical feature of?

NORCET 3 - 2022 (Shift-1)

Child Health Nursing (Pediatrics)

Easy

Appeared in: NORCET 3 - 2022 (Shift-1)

Explanation

The 'setting sun' sign is a hallmark finding in infants with hydrocephalus.
It is caused by increased intracranial pressure (ICP) from excess cerebrospinal fluid, which compresses the midbrain centers responsible for upward eye movement.
This compression leads to a paralysis of upgaze, causing the eyes to deviate downwards and reveal the sclera above the iris, similar to a setting sun.

Option B: While meningitis can lead to increased intracranial pressure, its classic signs are fever, nuchal rigidity (neck stiffness), and a bulging fontanelle. The 'setting sun' sign is not a primary or typical feature.
Option C: Encephalitis (inflammation of the brain) is characterized more by altered mental status, seizures, and fever. The 'setting sun' sign is not a classic presentation.
Option D: Parkinson's disease is a progressive neurodegenerative disorder primarily seen in older adults. Its main symptoms are tremor, rigidity, and bradykinesia (slowness of movement). It is entirely unrelated to the pediatric sign of hydrocephalus.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Clinical signs of hydrocephalus in infants as background academic context rather than a clinical decision trigger.
Early recognition of the 'setting sun' sign by a nurse is critical for the timely diagnosis and management of hydrocephalus, which can prevent irreversible brain damage and developmental delays.
Nurses are responsible for meticulous monitoring of infants at risk for increased ICP, including serial head circumference measurements, fontanelle assessment, and observing for subtle behavioral changes.
What if? If an infant with a rapidly increasing head circumference does NOT yet show the 'setting sun' sign, it does not rule out hydrocephalus. The sign may appear later. Other signs like a bulging fontanelle, irritability, and poor feeding are equally important and warrant immediate investigation.

How to Approach the Question

First, identify the key term in the question: ''Setting sun' sign'.
Analyze the accompanying image, which provides a clear visual representation of the sign in an infant.
Recall or deduce the underlying cause of this sign, which is related to eye muscle control and pressure within the cranium.
Connect this sign to pediatric conditions. The sign is specific to infants because their cranial sutures have not yet fused, allowing the head to expand under pressure.
Evaluate the given options. Hydrocephalus is the most direct and common cause of the chronic increase in intracranial pressure that leads to this sign in infants.
Eliminate the other options: Meningitis and encephalitis have different primary signs, and Parkinson's disease is an adult disorder with unrelated symptoms.

Concept Tested & Keywords

Concept Tested: Clinical signs of hydrocephalus in infants
Stem keywords: 'Setting sun' sign, classical feature
Lead-in keywords: is a classical feature of
Clinical cues: The image of an infant with downward deviated eyes is a key clinical cue for the 'setting sun' sign.

QT_ZKhgl5ii0OqOH2uDbdP

E6 Nelson Textbook of Pediatrics(2024) — Volume 2 pp. 1385-1387, 1386-1388

E6 Medicine Harrison 22e Part 1 p. 277-279