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Normal Anterior Fibromuscular Stroma (AFM)

1 min.
Pomeranz, Stephen
Stephen J Pomeranz, MD
Chief Medical Officer, ProScan Imaging. Founder, MRI Online
CME Eligible

Dr. P here talking the normal AFMS or anterior fibromuscular stroma, which is depicted here as an area of aquamarine blue, labeled AFS, and the normal AFMS shows bilateral symmetric shape. It's sort of crescent eric, right? It looks crescent eric on this axial map, and it's bilaterally symmetric. The signal intensity is similar to that of the obturator or pelvic floor muscles on T2, ADC map, and even on high value DWI without early enhancement. It's the fibromuscular stroma where things get dicey and challenging is when we have a scenario where a lesion originates over here and comes into the anterior fibromuscular stroma. Or a benign lesion originates here, we use yellow, a benign lesion originates here and starts infiltrating the anterior fibromuscular stroma, and then it gets complicated. Stay tuned, Dr. P out.

LESSON 2, TOPIC 23

Mastery Series: PI-RADS 2.1 Update

Mastery Series

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Content reviewed: December 29, 2021

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