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L1/L2 disk loss with endplate erosions and sclerosis and mild focal kyphosis. Collections (some of which are partially calcified) in the paraspinal region of lower thorax, right psoas muscle which decompresses into the posterior right flank subcutaneous tissues through a thin tract resulting in a very large collection, left psoas and iliacus muscles with extension into the left presacral space resulting is osteomyelitis. Mild bilateral striated nephrograms.