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Imaging in the study of macrocephaly: Why?, when?, how?
V Schonstedt Geldres1, X Stecher Guzmán2, C Manterola Mordojovich3
1Departamento de Imágenes de Clínica Alemana, Santiago, Chile; Departamento de Radiología, Hospital Luis Calvo Mackenna, Santiago, Chile; Facultad de Medicina, Clínica Alemana - Universidad del Desarrollo, Santiago, Chile.
Abstract:
Macrocephaly is a clinical term defined as an occipitofrontal circumference more than two standard deviations above the mean. It is present in 5% of children and is a common indication for imaging studies. There are multiple causes of macrocephaly; most of them are benign. Nevertheless, in some cases, macrocephaly is the clinical manifestation of a condition that requires timely medical and/or surgical treatment. The importance of imaging studies lies in identifying the patients who would benefit from treatment. Children with macrocephaly associated with neurologic alterations, neurocutaneous stigmata, delayed development, or rapid increase of the circumference have a greater risk of having disease. By contrast, parental macrocephaly is predictive of a benign condition. Limiting imaging studies to patients with increased risk makes it possible to optimize resources and reduce unnecessary exposure to tests.
Insights
Macrocephaly, a large head circumference, affects 5% of children. Imaging is crucial for identifying serious causes, guiding treatment, and avoiding unnecessary tests in benign cases.
Area of Science:
- Pediatrics
- Radiology
- Genetics
Background:
- Macrocephaly, defined as an occipitofrontal circumference >2 standard deviations above the mean, is observed in 5% of children.
- While most macrocephaly cases are benign, some indicate serious conditions requiring prompt medical or surgical intervention.
Purpose of the Study:
- To evaluate the utility of imaging studies in diagnosing the cause of macrocephaly.
- To identify clinical indicators that predict the need for medical or surgical treatment.
Main Methods:
- Review of clinical data and imaging studies in children presenting with macrocephaly.
- Correlation of clinical findings (neurologic alterations, neurocutaneous stigmata, developmental delay, rapid circumference increase, parental macrocephaly) with imaging results and diagnoses.
Main Results:
- Children with neurologic alterations, neurocutaneous stigmata, delayed development, or rapid head circumference growth have a higher likelihood of underlying disease.
- Parental macrocephaly is a strong predictor of a benign condition.
Conclusions:
- Imaging studies are essential for identifying children with macrocephaly who require treatment.
- Selective use of imaging in high-risk patients optimizes resource allocation and minimizes unnecessary patient exposure to tests.
