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A member asked:
Re: mri brain - can a lesion be a scar from a previous stroke and if so how long would it take an infarction to become a scar / lesion? (lft occip)
2 doctors weighed in across 2 answers
SHORT TIME: The basic sequence is first localized inflammation of about 24-48 hrs maximally, and then localized cleanup from glia, macrophages, and microglia for about 4-6 wks., any recovery of myelin takes about 4 wks after healing starts, and maximal scarring occurs about 3-4 months. So if you did have a stroke, a focal MRI lesion shows the prior location.
Answered 6/10/2014
5.5k views
Following injury: Following any injury, inflammation typically occurs for 4 days followed by scar tissue proliferation for a minimum of 6 weeks which is then followed by scar maturation which can be active for 2 years. Thereafter the scar is stable but always under a steady state of turnover.
Answered 11/30/2013
5.5k views
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