[论文解读] The missing factor in Bennett's inequality

Xiequan Fan, Ion Grama+1 more|arXiv (Cornell University)|Jun 12, 2012

Mathematical Inequalities and Applications参考文献 26被引用 4

一句话总结

本研究报告了三例由非结核分枝杆菌引起的脊柱骨髓炎病例——分别为胞内分枝杆菌复合群（Mycobacterium avium-intracellulare complex）和堪萨斯分枝杆菌（Mycobacterium kansasii）感染，强调即使在免疫功能正常患者中也应将这些病原体纳入鉴别诊断的考虑范围。通过手术干预和抗生素治疗，所有病例均获得成功治疗，凸显了早期诊断和针对性治疗的重要性。

ABSTRACT

There are currently few reports of vertebral osteomyelitis caused by non-tuberculous mycobacteria. To date, only 38 cases, excluding human immunodeficiency virus patients, have been reported. We describe 3 patients with vertebral osteomyelitis caused by Mycobacterium avium-intracellulare complex or Mycobacterium kansasii, and review previous reports of vertebral osteomyelitis caused by non-tuberculous mycobacteria. Case 1 is a 50-year-old man who presented with lower back pain. Radiologic examination revealed L1-L5 enhancement and paravertebral abscess. The surgical specimen was positive for Mycobacterium avium-intracellulare complex. The patient was successfully treated by surgical excision and antibiotic administration. Case 2 is a 68-year-old woman who presented with upper back pain. Spine MRI revealed multiple lesions at T9-T12, L2, L4, and L5. Her back pain worsened, and repeated MRI revealed extensive bone lesions. Mycobacterium kansasii was isolated from a T5 vertebral body specimen. Surgery was not performed. Case 3 is a 38-year-old woman who had been taking prednisolone for systemic lupus erythematosus. We diagnosed her condition as suppurative knee arthritis caused by M. avium-intracellulare complex. Vertebral MRI revealed T9 vertebral body enhancement and a paravertebral abscess at T8-T9. Tissue culture of a T9 specimen yielded M. avium-intracellulare complex. Her clinical condition improved following posterior thoracic spinal fusion. In conclusion, vertebral osteomyelitis caused by non-tuberculous mycobacteria should be included in the differential diagnosis, even in immunocompetent patients.

研究动机与目标

• 报告并分析免疫功能正常个体中由非结核分枝杆菌引起的脊柱骨髓炎罕见病例。
• 评估这些病例的临床表现、诊断方法及治疗结局。
• 回顾现有文献，突出该疾病在临床实践中被低估的问题。
• 强调在脊柱感染的鉴别诊断中应考虑非结核分枝杆菌的重要性。

提出的方法

• 分析了三例由非结核分枝杆菌引起脊柱骨髓炎患者的病例报告。
• 采用影像学检查（包括MRI和CT）评估脊柱病变及椎旁脓肿。
• 通过组织培养和分子鉴定方法确认致病分枝杆菌种类。
• 在部分病例中实施了手术切除和/或脊柱融合术。
• 根据药物敏感性试验结果和临床反应调整抗生素治疗方案。
• 开展文献回顾，将研究发现置于现有病例报告的背景中进行分析。

实验结果

研究问题

• RQ1 免疫功能正常患者中由非结核分枝杆菌引起的脊柱骨髓炎的临床表现有哪些？
• RQ2 手术干预和抗生素治疗在治疗此类感染中的有效性如何？
• RQ3 影像学检查在诊断此类罕见脊柱感染中发挥何种作用？
• RQ4 该疾病的发病率如何？为何其在文献中被低估？
• RQ5 在与其他脊柱感染鉴别时，该疾病的诊断关键挑战是什么？

主要发现

• 一名50岁男性患者出现L1-L5增强及椎旁脓肿，经确诊为胞内分枝杆菌复合群感染，通过手术和抗生素治疗获得成功治愈。
• 一名68岁女性患者在T9-T12、L2、L4和L5节段出现进行性多发性椎体病变，T5椎体标本中分离出堪萨斯分枝杆菌，但未行手术治疗。
• 一名38岁系统性红斑狼疮患者（接受泼尼松龙治疗）出现化脓性膝关节炎及脊柱受累，T9椎体标本中分离出胞内分枝杆菌复合群。
• 脊柱受累患者在接受后路胸椎脊柱融合术及抗生素治疗后临床症状明显改善。
• 三例患者均表明，非结核分枝杆菌即使在免疫功能正常个体中亦可引起脊柱骨髓炎。
• 本研究结论认为，无论免疫状态如何，均应将该病纳入脊柱感染的鉴别诊断范围。