Pneumosinus dilatans in anterior skull base meningiomas
Faculty of Medicine and Health Sciences
Faculty of Pharmaceutical, Biomedical and Veterinary Sciences . Biomedical Sciences
University Hospital Antwerp
Neuroradiology. - Berlin
, p. 307-311
University of Antwerp
Introduction Skull base meningiomas are often missed on non-contrast CT or MR examinations due to their close proximity to bone and low lesion to brain contrast. The purpose of this study is to illustrate that pneumosinus dilatans can be an indicator of anterior skull base meningiomas. Methods A retrospective search of the radiology information system and picture archiving and computing system database was performed. Search terms were meningioma in association with pneumosinus dilatans. Medical records and imaging studies were reviewed independently by two experienced neuroradiologists and were read in consensus. We recorded the patient age at the time of discovery of the meningioma, main presenting symptom(s), location of the tumor, and imaging characteristics. We also performed a comparative literature search for pneumosinus dilatans and its association with meningiomas. Results Ten patients (six women; four men) were identified in whom a meningioma of the anterior skull base was associated with a pneumosinus dilatans. Three patients had multiple meningiomas, so a total of 14 intracranial tumors were identified. Mean age at discovery was 59 years with an age range of ±20 years. All meningiomas were diagnosed by MRI and/or CT. Conclusion Pneumosinus dilatans can be a helpful sign to indicate the presence of a meningioma of the anterior skull base.