What is the premature closure of one or more Cranial Sutures called?

Uttarakhand CHO - 2021

Applied Anatomy

Easy

Appeared in: Uttarakhand CHO - 2021

Explanation

Craniosynostosis is the specific medical term for the premature fusion of one or more of the fibrous joints (sutures) between the bones of an infant's skull.
This early fusion restricts the skull's ability to expand as the brain grows, leading to a compensatory, abnormal growth pattern and a misshapen head.
The condition is significant because, if not corrected, it can lead to increased intracranial pressure, which may impact brain development, vision, and hearing.

Option A: This is a clinical sign ('cracked pot' sound on percussion) associated with separated sutures and increased intracranial pressure, often in hydrocephalus, not premature fusion.
Option B: This describes a specific head shape (short and wide). It is a potential symptom or outcome of craniosynostosis (bilateral coronal type), not the name of the underlying condition itself.
Option C: This refers to the softening or thinning of skull bones, giving them a 'ping-pong' feel. It is related to bone mineralization issues, not premature suture fusion.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Definition and types of craniosynostosis as background academic context rather than a clinical decision trigger.
Nurses play a crucial role in the early detection of craniosynostosis during well-child visits by meticulously measuring head circumference, plotting it on a growth chart, and palpating the fontanelles and suture lines for abnormalities like ridging.
A key nursing assessment is to help differentiate craniosynostosis from the more common and benign positional plagiocephaly. Craniosynostosis often involves a palpable ridge over the fused suture and does not improve with repositioning, whereas positional plagiocephaly does.
What if? If an infant with an abnormal head shape also presents with a tense or bulging fontanelle, persistent vomiting, and irritability, the nurse must suspect increased intracranial pressure. This is a medical emergency requiring immediate escalation for neurosurgical evaluation.

How to Approach the Question

This is a factual recall question that tests your knowledge of medical terminology for a specific pediatric condition.
First, identify the key definitional phrase in the question stem: 'premature closure of one or more Cranial Sutures'.
Next, evaluate each option against this precise definition.
Recognize that 'Brachycephaly' is a description of a head shape, which is a symptom or a type, not the underlying pathology of suture fusion itself.
Eliminate 'Macewens sign' and 'Craniotabes' as they relate to different skull abnormalities (increased intracranial pressure with separated sutures and bone softening, respectively).
This process of elimination and direct definition matching leads to 'Craniosynostosis' as the correct medical term for the condition described.

Concept Tested & Keywords

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E6 Nelson Textbook of Pediatrics(2024) — Volume 2 p. 1389-1391