Nagarajan Krishnan, Mishra Pravash, Velagada Sandeep, Tripathy Sujit K
Radiodiagnosis, Jawaharlal Institute of Postgraduate Medical Education and Research, Puducherry, IND.
Anatomy, All India Institute of Medical Sciences, Bhubaneswar, IND.
Cureus. 2020 Jun 6;12(6):e8479. doi: 10.7759/cureus.8479.
'Vacuum phenomenon' or 'pneumoarthrosis' term is used when there is air within a joint space. It has been described commonly in the spine and occasionally in the peripheral articulations. It is usually seen following trauma, and sometimes spontaneously in joints showing degenerative changes. Although it has been mainly described with a conventional radiograph, other diagnostic modalities such as ultrasonography, CT scan, and MRI have also been used for its delineation. We present three cases of vacuum phenomenon observed in the shoulder joints and the hip joint. These radiolucent shadows were visible in the radiograph and vanished subsequently. The 'air inside the joint' may be a benign condition and does not necessitate further workup unless the patient is symptomatic.
当关节间隙内存在气体时，会使用“真空现象”或“关节积气”这一术语。它在脊柱中较为常见，在周围关节中偶尔可见。通常在创伤后出现，有时也会在显示退行性改变的关节中自发出现。尽管它主要通过传统X线片进行描述，但超声、CT扫描和MRI等其他诊断方法也已用于其诊断。我们报告了3例在肩关节和髋关节中观察到的真空现象病例。这些透亮阴影在X线片上可见，随后消失。“关节内气体”可能是一种良性情况，除非患者有症状，否则无需进一步检查。
