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Spinal epidural abscess (SEA) is a rare condition, and a delay in its diagnosis causes paralysis. In this study, we report two rare cases of delayed diagnosis of SEA whose conditions improved after a state of complete paralysis. The first case was a 71-year-old diabetic man who received a corticosteroid injection for shoulder pain that caused intensified pain. Thereafter, the patient developed paralysis of both legs in stage IV according to Heusner staging. Subsequently, he was diagnosed with multiple abscesses and sepsis. He was in a poor state of health. Therefore, we treated his epidural abscess conservatively. After a month, his muscle strength had improved to Heusner stage III-A, and he was transferred to another hospital. The second case was a 64-year-old diabetic man who received an epidural corticosteroid injection for lower back pain. However, the pain intensified and was admitted to the hospital for pyelonephritis. He developed paralysis in both of his arms and legs presenting as a Heusner stage IV, caused by a cervical epidural abscess. A laminoplasty was performed and paralysis was improved. However, the patient subsequently developed a left subcortical hemorrhage. He underwent surgery. However, his right hemiplegia persisted, and on Day 21, he was transferred back to the previous hospital with a Heusner III-A. We could improve the patients’ paralysis by cooperating closely with infectious disease specialists and spine surgeons, taking intensive care, applying antibacterial agents appropriately, and operating quickly.

Background Paravertebral compartment syndrome occurring without trauma is quite rare. We report a case of compartment syndrome that occurred after spinal exercises. Case presentation A 23-year-old Japanese rower developed severe back pain and was unable to move 1 day after performing exercises for the spinal muscles. Initial evaluation at a nearby hospital revealed hematuria and elevated creatine phosphokinase levels. He was transferred to our hospital, where magnetic resonance imaging revealed no hematoma but confirmed edema in the paravertebral muscles. The compartment pressure measurements were elevated bilaterally. Despite his pain being severe, his creatine phosphokinase levels were expected to peak and decline; his urine output was normal; and surgery was undesirable. Therefore, we opted for conservative management. The next day, the patient’s compartment pressure diminished, and his pain levels decreased to 2/10. After 5 days, he was able to walk without medication. Conclusions We present a rare case of compartment syndrome of the paravertebral muscles with good resolution following conservative management. We hope our case findings will help avoid unnecessary surgery in cases of paravertebral compartment syndrome.