Temporal bone AG: Nonvenous sinus-related (aberrant) pseudopodial pia-arachnoid projection into tegmen tympani or posterior wall of temporal bone
IMAGING
General Features
CT Findings
MR Findings
Imaging Recommendations
DIFFERENTIAL DIAGNOSIS
PATHOLOGY
General Features
Gross Pathologic & Surgical Features
Microscopic Features
CLINICAL ISSUES
Presentation
Demographics
Treatment
Selected References
Junet P et al: Spontaneous osteo-dural fistulae of petrous bone posterior wall. Eur Ann Otorhinolaryngol Head Neck Dis. 130(6):341-3, 2013
Trimble CR et al: "Giant" arachnoid granulations just like CSF?: NOT!! AJNR Am J Neuroradiol. 31(9):1724-8, 2010
Lee MH et al: Prevalence and appearance of the posterior wall defects of the temporal bone caused by presumed arachnoid granulations and their clinical significance: CT findings. AJNR Am J Neuroradiol. 29(9):1704-7, 2008
VandeVyver V et al: Arachnoid granulations of the posterior temporal bone wall: imaging appearance and differential diagnosis. AJNR Am J Neuroradiol. 28(4):610-2, 2007
Gacek RR et al: Adult spontaneous cerebrospinal fluid otorrhea: diagnosis and management. Am J Otol. 20(6):770-6, 1999
Gacek RR et al: Arachnoid granulations of the temporal bone. Am J Otol. 20(3):405-6, 1999
Gacek RR: Evaluation and management of temporal bone arachnoid granulations. Arch Otolaryngol Head Neck Surg. 118(3):327-32, 1992
Related Anatomy
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Related Differential Diagnoses
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References
Tables
Tables
KEY FACTS
Terminology
Imaging
Top Differential Diagnoses
Pathology
Clinical Issues
TERMINOLOGY
Abbreviations
Arachnoid granulation (AG)
Synonyms
Aberrant AG, osteodural defects
When large → giant AG
Definitions
Temporal bone AG: Nonvenous sinus-related (aberrant) pseudopodial pia-arachnoid projection into tegmen tympani or posterior wall of temporal bone
IMAGING
General Features
CT Findings
MR Findings
Imaging Recommendations
DIFFERENTIAL DIAGNOSIS
PATHOLOGY
General Features
Gross Pathologic & Surgical Features
Microscopic Features
CLINICAL ISSUES
Presentation
Demographics
Treatment
Selected References
Junet P et al: Spontaneous osteo-dural fistulae of petrous bone posterior wall. Eur Ann Otorhinolaryngol Head Neck Dis. 130(6):341-3, 2013
Trimble CR et al: "Giant" arachnoid granulations just like CSF?: NOT!! AJNR Am J Neuroradiol. 31(9):1724-8, 2010
Lee MH et al: Prevalence and appearance of the posterior wall defects of the temporal bone caused by presumed arachnoid granulations and their clinical significance: CT findings. AJNR Am J Neuroradiol. 29(9):1704-7, 2008
VandeVyver V et al: Arachnoid granulations of the posterior temporal bone wall: imaging appearance and differential diagnosis. AJNR Am J Neuroradiol. 28(4):610-2, 2007
Gacek RR et al: Adult spontaneous cerebrospinal fluid otorrhea: diagnosis and management. Am J Otol. 20(6):770-6, 1999
Gacek RR et al: Arachnoid granulations of the temporal bone. Am J Otol. 20(3):405-6, 1999
Gacek RR: Evaluation and management of temporal bone arachnoid granulations. Arch Otolaryngol Head Neck Surg. 118(3):327-32, 1992
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