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--- plexus_pathology [2026/06/11 03:29] – scott
+++ plexus_pathology [2026/06/11 05:51] (current) – scott
@@ Line 3: / Line 3: @@
 ====Plexus Pathology====
-Locating pathology in either the brachial or lumbar plexus can be difficult; the nerves are small, have tortuous routes, extend far into the limbs, and run parallel to veins and arteries. In the case of the brachial plexus, there is also respiratory motion and ventral location to consider. An imaging approach appropriate for these pathologies would include:
+Locating pathology in either the brachial or lumbar plexus can be difficult; the nerves are small, have tortuous routes, extend far into the limbs, and run parallel to veins and arteries. In the case of the brachial plexus, there is also respiratory motion and ventral location to consider. An imaging approach appropriate for these pathologies is described in the [[brachial_plexus|Brachial Plexus MRI]] Tips and Tricks section. Inflammation of the nerves is possible, but a more common pathology to be found in either plexus is the Peripheral Nerve Sheath Tumor (PNST); the brachial plexus is more commonly affected than the lumbar plexus. There is some variability in the appearance of PNST's, it could be a discrete or large lesion, or could appear as thickened and enhancing nerves. Lesions can occur at any point along the nerve, but are generally categorized by location:
-  * High in-plane resolution to resolve individual nerves
+  * Root
-  * Thin slices to visualize the origin and course or nerves
+  * Plexus
-  * Suppression of blood signal from nearby vessels for better discernment and less flow artifact
+  * Peripheral
-  * Both fat suppressed AND non-fat suppressed sequences
-  * Fat suppressed post contrast imaging
+====Brachial Plexus: Root====
-  * Large FOV to include any innervated muscles to identify atrophy
-  * Long slice coverage to image distal muscles  to identify atrophy
+{{::bplexrootplext2.png?600|}}
-  * Anterior coils (Brachial Plexus)
-  * Motion reduction techniques
+{{::bplexrootplext1.png?600|}}
+====Brachial Plexus: Thickened Nerve====
+{{::bplexthicknerves.png?600|}}
+====Brachial Plexus: Peripheral====
+{{::sag_t2_bp_1_.gif?|}}
+{{::ax_t2_bp_1_.gif?|}}
+{{::ax_t1_fs_c_bp_1_.gif?|}}
+{{::dwi_bp_mip_1_.gif?|}}
+====Lumbar Plexus====
+{{::llplexstir.png?600|}}
+{{::lplexaxgad.png?600|}}