The Child With Macrocephaly: Differential Diagnosis and Neuroimaging Findings

Area of Science:

• Pediatric Radiology
• Neuroimaging
• Developmental Pediatrics

Background:

• Macrocephaly, characterized by an enlarged head circumference, is a common finding in children.
• It can result from increased volume in intracranial compartments, affecting head growth prenatally or postnatally.
• Accurate diagnosis is essential for appropriate management.

Purpose of the Study:

• To present a systematic imaging strategy for evaluating pediatric macrocephaly.
• To highlight characteristic neuroimaging features of common and rare disorders associated with macrocephaly.
• To aid clinicians in diagnosing and managing children with enlarged head circumference.

Main Methods:

• Review of neuroimaging techniques used in pediatric macrocephaly assessment.
• Correlation of imaging findings with specific etiological diagnoses.
• Emphasis on key radiological signs for differential diagnosis.

Main Results:

• Identification of distinct neuroimaging patterns for various causes of macrocephaly.
• Illustrative examples of common conditions (e.g., hydrocephalus, benign external hydrocephalus) and important rare disorders.
• Demonstration of how imaging guides the diagnostic pathway.

Conclusions:

• Macrocephaly is a frequent pediatric presentation requiring a structured diagnostic approach.
• Neuroimaging is pivotal in identifying the underlying cause of enlarged head circumference.
• Establishing a diagnosis through imaging is crucial for guiding timely and effective patient management.