Incidental findings on brain MRI in a cohort of diabetic patients

Area of Science:

• Neurology
• Radiology
• Endocrinology

Background:

• Type 2 diabetes mellitus (T2DM) is associated with increased cerebrovascular risk.
• Brain magnetic resonance imaging (MRI) is frequently used in T2DM patients for various reasons.
• Incidental findings on nonenhanced brain MRI require careful evaluation and management strategies.

Purpose of the Study:

• To determine the frequency of incidental findings in nonenhanced brain MRI scans of middle-aged individuals with T2DM.
• To categorize the types of incidental findings observed.
• To assess the prevalence of findings requiring further clinical work-up (referral findings).

Main Methods:

• Retrospective analysis of 289 nonenhanced brain MRI scans from T2DM patients aged 40-75 years.
• Classification of incidental findings into vascular, neoplastic, and other categories.
• Classification of referral findings and comparison with existing literature on management.

Main Results:

• An overall prevalence of 10.4% for incidental findings was observed.
• Vascular lesions (2.4%) were the most common incidental findings, followed by calcifications (2.1%), cystic lesions (2.1%), and neoplastic lesions (1.7%).
• Referral findings requiring further evaluation constituted 1.7% of the scans.

Conclusions:

• Incidental findings are relatively common in the brains of middle-aged T2DM patients.
• Vascular findings represent the most frequent incidental discoveries, consistent with prior research.
• There is a notable lack of clinical evidence to guide the management of most incidental findings in this population.