Subsequently, the detection of incidental findings (i.e., previously undetected anomalies of potential clinical relevance that are unexpectedly detected and not related to the indication of the scan) in large numbers of presumably neurologically healthy participants became a well-recognized and more frequent topic of concern. Over the past decades, MRI brain imaging acquired a firm position in clinical practice and medical research as a powerful means of detecting both anatomic and functional information about the brain. It also raises the awareness of the importance of screening the brain scans while scanning the patient for other purposes like scanning the paranasal sinuses, orbits, and petrous temporal bones. Knowing about their existence will help directing patients towards the proper specialist and plan for appropriate follow-up to avoid potential clinical hazards. The most common findings were meningiomas, followed by vascular malformations and arachnoids cysts. Incidental findings were relatively common in the adult Egyptian population. The prevalence of neoplastic incidental findings increased with age, while the detection of non-neoplastic findings seemed to decrease with age. Meningiomas, cavernomas, and aneurysms had significantly higher prevalence in females than in males. Incidental findings were recorded in 11.7% of the subjects with meningiomas being the most commonly encountered finding (2.5%) followed by vascular malformations (aneurysms, cavernomas) in about 2% of the subjects. Seven hundred fifty-three neurologically healthy subjects (389 males and 364 females) who underwent MRI scanning of the brain were screened for the presence of incidental findings, and the prevalence of each finding was recorded. ![]() Knowing about their existence would help clinicians to inform their patients of the potential risks and plan for long-term follow-up when indicated. Incidental findings are defined as previously undetected anomalies of potential clinical relevance that are unexpectedly detected and not related to the indication of the scan. Performing MRI at higher resolution and stronger magnetic field and with more selective sequences has led to the detection of subtle brain anomalies that were not detected previously. Apparently, asymptomatic intracranial anomalies of potential clinical significance are becoming problematic, especially with the increase of use of brain MRI by clinicians and researchers.
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