• Alexander Massmann, Patric Garcia, Antonius Pizanis, Christian Roth, Christian Nieder, Günther Schneider, and Arno Bücker.
• Department of Diagnostic and Interventional Radiology, Saarland University Hospital, Homburg/Saar, Germany. Alexander.Massmann@uks.eu
• Spine. 2012 Feb 1;37(3):E199-202.

Study DesignCase report and clinical discussion.ObjectiveTo describe a rare case of hyperpneumatization of the skull base including the cervical spine with the atlas bone.Summary Of Background DataInitial imaging studies of physically traumatized patients consist of conventional radiographs. An atypical radiolucency is often misdiagnosed as a primary malignancy or a secondary osteolytic metastasis. Further imaging studies may reveal an underlying atypical hyperpneumatization as a very rare benign differential diagnosis. Pathophysiologically, embryological developmental anomalies as well as an elevated pressure to the middle and inner ear are discussed.MethodsWe present a symptomatic 40-year-old man with conventional radiographs, after computed tomography and magnetic resonance imaging examinations.ResultsImaging studies reveal an uncommon radiolucency of the skull base including the atlas bone, free air beneath the mastoid bone, stylomastoid foramen, epidural air adjacent to the atlas bone, and surrounding soft-tissue emphysema.ConclusionAtypical radiolucency may represent a very rare benign hyperpneumatization of the skull base, which may include the craniocervical junction. Because of microfractures of the thinned and consecutive, less stable bones, this also can lead to free air and soft-tissue emphysema, which has not been described previously. Special care should be taken to identify epidural free air because of a possible communication of the epidural space with the external environment. Harmful activities and especially high-speed trauma could result in fractures of the cervical spine due to decreased stability of the hyperpneumatized bones.

20 keywords...

hide…