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L4-L5: diffuse disc bulge, exerting mild pressure on the thecal sac.
L5-S1: calcified medial disc herniation (wide protrusion), tangential to the thecal sac. Bilateral osseous narrowing of neural foramina.
Incidental findings:
Concentric wall thickening in descending colon 7.5 cm in length. From its mesenteric wall, an exophytic mass measuring 3.0 x 3.0 x 3.1 cm with a lobular border juts out. The mass is surrounded by mild fat stranding and small mesocolic lymph nodes, and blood vessels are seen passing into it.