Bookmarks
KEY FACTS
Terminology
Imaging
Top Differential Diagnoses
Pathology
Clinical Issues
TERMINOLOGY
Synonyms
- Epidermoid tumor, primary cholesteatoma, or epithelial inclusion cyst
Definitions
- Congenital inclusion of ectodermal epithelial elements during neural tube closure
IMAGING
General Features
CT Findings
MR Findings
Imaging Recommendations
DIFFERENTIAL DIAGNOSIS
PATHOLOGY
General Features
Gross Pathologic & Surgical Features
Microscopic Features
CLINICAL ISSUES
Presentation
Demographics
Natural History & Prognosis
Treatment
DIAGNOSTIC CHECKLIST
Consider
Image Interpretation Pearls
Reporting Tips
Selected References
- Gopalakrishnan CV et al: Long term outcome in surgically treated posterior fossa epidermoids. Clin Neurol Neurosurg. 117:93-9, 2014
- Jolapara M et al: Diffusion tensor mode in imaging of intracranial epidermoid cysts: one step ahead of fractional anisotropy. Neuroradiology. 51(2):123-9, 2009
- Schiefer TK et al: Epidermoids of the cerebellopontine angle: a 20-year experience. Surg Neurol. 70(6):584-90; discussion 590, 2008
- Ben Hamouda M et al: Atypical CT and MRI aspects of an epidermoid cyst. J Neuroradiol. 34(2):129-32, 2007
- Bonneville F et al: Imaging of cerebellopontine angle lesions: an update. Part 2: intra-axial lesions, skull base lesions that may invade the CPA region, and non-enhancing extra-axial lesions. Eur Radiol. 17(11):2908-20, 2007
- Osborn AG et al: Intracranial cysts: radiologic-pathologic correlation and imaging approach. Radiology. 239(3):650-64, 2006
- Liu P et al: MR imaging of epidermoids at the cerebellopontine angle. Magn Reson Med Sci. 2(3):109-15, 2003
- Dutt SN et al: Radiologic differentiation of intracranial epidermoids from arachnoid cysts. Otol Neurotol. 23(1):84-92, 2002
- Kobata H et al: Cerebellopontine angle epidermoids presenting with cranial nerve hyperactive dysfunction: pathogenesis and long-term surgical results in 30 patients. Neurosurgery. 50(2):276-85; discussion 285-6, 2002
- Dechambre S et al: Diffusion-weighted MRI postoperative assessment of an epidermoid tumour in the cerebellopontine angle. Neuroradiology. 41(11):829-31, 1999
- Ochi M et al: Unusual CT and MR appearance of an epidermoid tumor of the cerebellopontine angle. AJNR Am J Neuroradiol. 19(6):1113-5, 1998
- Talacchi A et al: Assessment and surgical management of posterior fossa epidermoid tumors: report of 28 cases. Neurosurgery. 42(2):242-51; discussion 251-2, 1998
- Timmer FA et al: Chemical analysis of an epidermoid cyst with unusual CT and MR characteristics. AJNR Am J Neuroradiol. 19(6):1111-2, 1998
- Ikushima I et al: MR of epidermoids with a variety of pulse sequences. AJNR Am J Neuroradiol. 18(7):1359-63, 1997
- Kallmes DF et al: Typical and atypical MR imaging features of intracranial epidermoid tumors. AJR Am J Roentgenol. 169(3):883-7, 1997
- Tien RD et al: Variable bandwidth steady-state free-precession MR imaging: a technique for improving characterization of epidermoid tumor and arachnoid cyst. AJR Am J Roentgenol. 164(3):689-92, 1995
- Gao PY et al: Radiologic-pathologic correlation. Epidermoid tumor of the cerebellopontine angle. AJNR Am J Neuroradiol. 13(3):863-72, 1992
- Tsuruda JS et al: Diffusion-weighted MR imaging of the brain: value of differentiating between extraaxial cysts and epidermoid tumors. AJNR Am J Neuroradiol. 11(5):925-31; discussion 932-4, 1990
- Tampieri D et al: MR imaging of epidermoid cysts. AJNR Am J Neuroradiol. 10(2):351-6, 1989
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References
Tables
Tables
KEY FACTS
Terminology
Imaging
Top Differential Diagnoses
Pathology
Clinical Issues
TERMINOLOGY
Synonyms
- Epidermoid tumor, primary cholesteatoma, or epithelial inclusion cyst
Definitions
- Congenital inclusion of ectodermal epithelial elements during neural tube closure
IMAGING
General Features
CT Findings
MR Findings
Imaging Recommendations
DIFFERENTIAL DIAGNOSIS
PATHOLOGY
General Features
Gross Pathologic & Surgical Features
Microscopic Features
CLINICAL ISSUES
Presentation
Demographics
Natural History & Prognosis
Treatment
DIAGNOSTIC CHECKLIST
Consider
Image Interpretation Pearls
Reporting Tips
Selected References
- Gopalakrishnan CV et al: Long term outcome in surgically treated posterior fossa epidermoids. Clin Neurol Neurosurg. 117:93-9, 2014
- Jolapara M et al: Diffusion tensor mode in imaging of intracranial epidermoid cysts: one step ahead of fractional anisotropy. Neuroradiology. 51(2):123-9, 2009
- Schiefer TK et al: Epidermoids of the cerebellopontine angle: a 20-year experience. Surg Neurol. 70(6):584-90; discussion 590, 2008
- Ben Hamouda M et al: Atypical CT and MRI aspects of an epidermoid cyst. J Neuroradiol. 34(2):129-32, 2007
- Bonneville F et al: Imaging of cerebellopontine angle lesions: an update. Part 2: intra-axial lesions, skull base lesions that may invade the CPA region, and non-enhancing extra-axial lesions. Eur Radiol. 17(11):2908-20, 2007
- Osborn AG et al: Intracranial cysts: radiologic-pathologic correlation and imaging approach. Radiology. 239(3):650-64, 2006
- Liu P et al: MR imaging of epidermoids at the cerebellopontine angle. Magn Reson Med Sci. 2(3):109-15, 2003
- Dutt SN et al: Radiologic differentiation of intracranial epidermoids from arachnoid cysts. Otol Neurotol. 23(1):84-92, 2002
- Kobata H et al: Cerebellopontine angle epidermoids presenting with cranial nerve hyperactive dysfunction: pathogenesis and long-term surgical results in 30 patients. Neurosurgery. 50(2):276-85; discussion 285-6, 2002
- Dechambre S et al: Diffusion-weighted MRI postoperative assessment of an epidermoid tumour in the cerebellopontine angle. Neuroradiology. 41(11):829-31, 1999
- Ochi M et al: Unusual CT and MR appearance of an epidermoid tumor of the cerebellopontine angle. AJNR Am J Neuroradiol. 19(6):1113-5, 1998
- Talacchi A et al: Assessment and surgical management of posterior fossa epidermoid tumors: report of 28 cases. Neurosurgery. 42(2):242-51; discussion 251-2, 1998
- Timmer FA et al: Chemical analysis of an epidermoid cyst with unusual CT and MR characteristics. AJNR Am J Neuroradiol. 19(6):1111-2, 1998
- Ikushima I et al: MR of epidermoids with a variety of pulse sequences. AJNR Am J Neuroradiol. 18(7):1359-63, 1997
- Kallmes DF et al: Typical and atypical MR imaging features of intracranial epidermoid tumors. AJR Am J Roentgenol. 169(3):883-7, 1997
- Tien RD et al: Variable bandwidth steady-state free-precession MR imaging: a technique for improving characterization of epidermoid tumor and arachnoid cyst. AJR Am J Roentgenol. 164(3):689-92, 1995
- Gao PY et al: Radiologic-pathologic correlation. Epidermoid tumor of the cerebellopontine angle. AJNR Am J Neuroradiol. 13(3):863-72, 1992
- Tsuruda JS et al: Diffusion-weighted MR imaging of the brain: value of differentiating between extraaxial cysts and epidermoid tumors. AJNR Am J Neuroradiol. 11(5):925-31; discussion 932-4, 1990
- Tampieri D et al: MR imaging of epidermoid cysts. AJNR Am J Neuroradiol. 10(2):351-6, 1989
