MS lesions can vary significantly in size. An 18mm lesion would be considered relatively large, and the fact that it has grown is important information that should be discussed with your neurologist. Growth in lesion size can indicate active disease.
Your doctor can track lesion changes through MRI scans with contrast Show Full Answer
MS lesions can vary significantly in size. An 18mm lesion would be considered relatively large, and the fact that it has grown is important information that should be discussed with your neurologist. Growth in lesion size can indicate active disease.
Your doctor can track lesion changes through MRI scans with contrast (gadolinium), which helps show whether lesions are new (active) or older than three months. The size, location, and growth of lesions help determine treatment decisions. The impact of a lesion depends not just on its size but also on its location in the brain. For example, lesions in the frontal lobe can affect movement and speech, while those in the parietal lobe may impact sensations. Regular MRI monitoring is essential to track changes in lesion size and determine if current treatments are effectively managing disease progression.
September 24, 2025
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