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BACKGROUND: Early balloon kyphoplasty (BKP) intervention for acute osteoporotic vertebral fracture (OVF) has been reported to be more effective than the conservative treatment. However, complications of early BKP intervention are still unknown. OBSERVATIONS: A 71-year-old patient with OVF of L2 underwent BKP 2 weeks after symptom onset. Preoperative magnetic resonance imaging (MRI) and radiograph were compatible with new L2 OVF. Although computed tomography (CT) images revealed the atypical destruction of lower endplate of L2 as OVF, L2 BKP was planned. After BKP, his back pain improved dramatically. Two weeks after BKP, his lower back pain recurred. MRI and CT confirmed the diagnosis of infectious spondylitis with paravertebral abscess formation. With adequate antibiotic treatment and rehabilitation, he was symptom-free and completely ambulatory without signs of infection. LESSONS: Signal changes on the fractured vertebral bodies during initial MRI and fractured vertebral instability on radiograph can mislead the surgeon to interpret the infection as a benign compression fracture. If the patients exhibit unusual destruction of the endplate on CT imaging, "simultaneous-onset" spondylitis with vertebral fracture should be included in the differential diagnosis. To determine the strategy for OVF, preoperative biopsy is recommended if simultaneous-onset spondylitis with vertebral fracture is suspected.

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STUDY DESIGN: Retrospective case series. OBJECTIVE: The aim of this study was to examine the spontaneous incidence rate and features of pyogenic vertebral osteomyelitis in osteoporotic vertebral fracture (OVF). SUMMARY OF BACKGROUND DATA: Pyogenic vertebral osteomyelitis is a rare complication of OVF. We experienced some cases of vertebral body infection after OVF. METHODS: In this retrospective, single-center study, clinical data were collected by chart review. We examined the number of cases of pyogenic vertebral osteomyelitis following OVF between April 2014 and August 2018. Further, we examined the mechanism of injury, age, sex, duration from the diagnosis of OVF to the diagnosis of vertebral body infection, C-reactive protein level at the time of diagnosis of OVF, medical history, primary infection site, and serious events. RESULTS: The spontaneous incidence rate of complications was 0.7% (4/554). In all cases (two males and two females), fall history was present and vertebral body infection was not suspected to be present at the point of injury. The average age was 81.8 (range, 75-89, SD, 5.7) years. The average duration from the diagnosis of OVF to the diagnosis of vertebral body infection was 55.0 (range, 16-132, SD, 52.4) days. The average C-reactive protein level at the time of diagnosis of OVF was 11.5 (range, 0.5-29.7, SD, 12.7) mg/L. Medical history included rheumatoid arthritis (n = 1), diabetes mellitus (n = 1), malignant tumor (stage IV) (n = 1), and brain infarction (n = 2). The primary sources of infection were pneumonia (n = 3), and urinary tract infection (n = 1), and all patients experienced bacillemia at/after the diagnosis of fracture. All patients died due to septic shock. CONCLUSION: The spontaneous incidence rate of vertebral body infection among OVF patients was 0.7%; however, the occurrence of this complication led to serious events. Clinicians should pay attention to the possibility of bacillemia in elderly or immunocompromised OVF patients. LEVEL OF EVIDENCE: 4.

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RATIONALE: A spinal subdural hematoma (SDH) is rarely complicated with an intracranial SDH. We found only 7 cases of spontaneous concurrent lumbar spinal and cranial SDHs, in which lumbar symptoms occurred before head symptoms. PATIENT CONCERNS: We describe a 77-year-old man with spontaneous concurrent spinal and cranial SDHs, in whom the spinal SDH was identified 30 days before the intracranial chronic SDH. DIAGNOSIS: Magnetic resonance imaging showed a spinal SDH at L4/L5. There was no paralysis, and the patient was managed conservatively. About 30 days after the onset of back pain, he experienced tinnitus and visual hallucination. Brain computed tomography showed a chronic SDH and midline shift. INTERVENTIONS: Burr-hole evacuation was performed, and the patient's condition improved. OUTCOMES: At 5 months of follow-up, there was no recurrence of the spinal or intracranial SDH. LESSONS: It is important to consider the possibility of intracranial hemorrhage when a spinal SDH is identified.

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Patients with inflammatory bowel disease often have extraintestinal manifestations (EIMs) involving almost all organ systems, but little has been reported on Achilles tendinitis. Herein, we present a unique case of Achilles tendinitis, which manifested shortly after initiation of mesalazine therapy for ulcerative colitis. A 26-year-old Japanese woman with bloody diarrhea and abdominal cramps lasting for 7 days was referred to our hospital. The Lichtiger clinical activity index (CAI) score was 9 at the first visit. Based on the clinical symptoms and examination results, she was diagnosed with ulcerative pancolitis in the active phase, and treatment with mesalazine (2.4 g/day) and probiotics was initiated. Her symptoms resolved within 7 days of treatment (CAI 3). However, she then developed bilateral Achilles tendinitis without any apparent cause. The Achilles tendinitis subsided with conservative management within 2 weeks, despite continuation of mesalazine therapy. This case instructively suggests that Achilles tendinitis should be noted as an EIM of ulcerative colitis.

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