Lumbar disc extrusion with pelvic kidney

Case contributed by Henry Knipe
Diagnosis certain

Presentation

Low back pain with left sciatica.

Patient Data

Age: 35 years
Gender: Male

Degenerated L4-5 disc with a left asymmetric disc bulge with a superimposed left paracentral zone disc extrusion posteriorly displaces the traversing left L5 nerve root. Mild spinal canal and left neural exit foraminal stenoses at L4-5.

Incidental pelvic kidney, no kidney in the right renal fossa.

Case Discussion

This is a fairly typical degenerative disc case with a small disc extrusion displacing but not compressing a traversing nerve root. The interesting part of the case is the incidental pelvic kidney, which if an anterior lumbar fusion was being considered, would be a key finding. In this case, a microdiscectomy was performed.

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