Complex sentence: Phlegmon is a spreading diffuse inflammatory process with formation of suppurative/purulent exudate or pus, (diffuse enhancement) or localized abscess, (peripheral enhancement) in the epidural, subligamentous or paraspinous space.
Split into simpler sentences: Phlegmon is a spreading diffuse inflammatory process with formation of suppurative/purulent exudate or pus. Phlegmon in the spine can be a diffuse enhancement, or localized abscess, (peripheral enhancement) in the epidural, subligamentous or paraspinous space.