Related Experiment Video
Updated: Aug 16, 2026

Role of Diffusion MRI Tractography in Endoscopic Endonasal Skull Base Surgery
Published on: July 5, 2021
Pneumosinus dilatans and orbital meningioma in neurofibromatosis type 2
T Vauterin1, I Mombaerts, M Jorissen
1Department of Oto-Rhino-Laryngology, Head and Neck Surgery, University Hospital KULeuven, Kapucijnenvoer 33, 3000 Leuven, Belgium.
Abstract:
We report on a 9-year-old boy with neurofibromatosis type 2 and a progressive proptosis of the left eye. Imaging studies revealed a pneumosinus dilatans of the left ethmoidal and frontal sinuses and an adjacent left orbital mass. Incision biopsy of the orbital mass showed a meningiothelial meningioma. Orbital and intracranial meningiomas are frequently associated with pneumosinus dilatans. This report illustrates the relationship of pneumosinus dilatans, intra-orbital meningioma and neurofibromatosis type 2.
Related Concept Videos
Bacterial Meningitis II: Pathophysiology
Cranial Bones: Lateral View
The temporal bone forms the lower lateral side of the skull. The temporal bone is subdivided into several regions. The flattened upper portion is the squamous portion of the temporal bone. Below this area and projecting anteriorly is the zygomatic process of the temporal bone, which forms the posterior portion of the zygomatic arch. Posteriorly is the mastoid portion of the temporal bone. Projecting...
