Unusual MR Imaging Features in CT Hyperdense Posterior Fossa Dermoids: Report of Two Cases
Dermoids, either intracranial or in the rest of the body, usually have typical imaging findings due to their fat contents as fat density in computed tomography (CT) and T1- and T2-hyperintensity in magnetic resonance imaging (MRI). Variable imaging appearances have been described due to soft tissue...
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| Format: | Article |
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Thieme Medical and Scientific Publishers Pvt. Ltd.
2020-02-01
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| Series: | Indian Journal of Neurosurgery |
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| Online Access: | http://www.thieme-connect.de/DOI/DOI?10.1055/s-0039-3402594 |
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| author | Anbazhagan Sathiaprabhu Nichanametla Sravani Krishnan Nagarajan Sekar Sabarish Kapil Patil |
| author_facet | Anbazhagan Sathiaprabhu Nichanametla Sravani Krishnan Nagarajan Sekar Sabarish Kapil Patil |
| author_sort | Anbazhagan Sathiaprabhu |
| collection | DOAJ |
| description | Dermoids, either intracranial or in the rest of the body, usually have typical imaging findings due to their fat contents as fat density in computed tomography (CT) and T1- and T2-hyperintensity in magnetic resonance imaging (MRI). Variable imaging appearances have been described due to soft tissue contents, hair, calcification, or even tooth. Posterior fossa dermoids have been reported as a specific variant that shows hyperdensity in CT and mixed signal intensity in MRI. We report two cases of posterior fossa CT hyperdense dermoids that showed unusual MRI features in the form of signal loss in magnetization transfer images and lipid peak in magnetic resonance spectroscopy. Both patients underwent surgical resection and histopathological confirmation and the causes of this unusual imaging appearance are discussed. |
| format | Article |
| id | doaj-art-3d3a065983f5410782eebfa35d9d376a |
| institution | OA Journals |
| issn | 2277-954X 2277-9167 |
| language | English |
| publishDate | 2020-02-01 |
| publisher | Thieme Medical and Scientific Publishers Pvt. Ltd. |
| record_format | Article |
| series | Indian Journal of Neurosurgery |
| spelling | doaj-art-3d3a065983f5410782eebfa35d9d376a2025-08-20T02:16:39ZengThieme Medical and Scientific Publishers Pvt. Ltd.Indian Journal of Neurosurgery2277-954X2277-91672020-02-010901636610.1055/s-0039-3402594Unusual MR Imaging Features in CT Hyperdense Posterior Fossa Dermoids: Report of Two CasesAnbazhagan Sathiaprabhu0Nichanametla Sravani1Krishnan Nagarajan2Sekar Sabarish3Kapil Patil4Department of Neurosurgery, Jawaharlal Institute of Postgraduate Medical Education & Research (JIPMER), Pondicherry, IndiaDepartment of Radio-Diagnosis, Jawaharlal Institute of Postgraduate Medical Education & Research (JIPMER), Pondicherry, IndiaDepartment of Radio-Diagnosis, Jawaharlal Institute of Postgraduate Medical Education & Research (JIPMER), Pondicherry, IndiaDepartment of Radio-Diagnosis, Jawaharlal Institute of Postgraduate Medical Education & Research (JIPMER), Pondicherry, IndiaDepartment of Neurosurgery, Jawaharlal Institute of Postgraduate Medical Education & Research (JIPMER), Pondicherry, IndiaDermoids, either intracranial or in the rest of the body, usually have typical imaging findings due to their fat contents as fat density in computed tomography (CT) and T1- and T2-hyperintensity in magnetic resonance imaging (MRI). Variable imaging appearances have been described due to soft tissue contents, hair, calcification, or even tooth. Posterior fossa dermoids have been reported as a specific variant that shows hyperdensity in CT and mixed signal intensity in MRI. We report two cases of posterior fossa CT hyperdense dermoids that showed unusual MRI features in the form of signal loss in magnetization transfer images and lipid peak in magnetic resonance spectroscopy. Both patients underwent surgical resection and histopathological confirmation and the causes of this unusual imaging appearance are discussed.http://www.thieme-connect.de/DOI/DOI?10.1055/s-0039-3402594posterior fossa dermoidhyperdense dermoidmagnetic resonance imaging |
| spellingShingle | Anbazhagan Sathiaprabhu Nichanametla Sravani Krishnan Nagarajan Sekar Sabarish Kapil Patil Unusual MR Imaging Features in CT Hyperdense Posterior Fossa Dermoids: Report of Two Cases Indian Journal of Neurosurgery posterior fossa dermoid hyperdense dermoid magnetic resonance imaging |
| title | Unusual MR Imaging Features in CT Hyperdense Posterior Fossa Dermoids: Report of Two Cases |
| title_full | Unusual MR Imaging Features in CT Hyperdense Posterior Fossa Dermoids: Report of Two Cases |
| title_fullStr | Unusual MR Imaging Features in CT Hyperdense Posterior Fossa Dermoids: Report of Two Cases |
| title_full_unstemmed | Unusual MR Imaging Features in CT Hyperdense Posterior Fossa Dermoids: Report of Two Cases |
| title_short | Unusual MR Imaging Features in CT Hyperdense Posterior Fossa Dermoids: Report of Two Cases |
| title_sort | unusual mr imaging features in ct hyperdense posterior fossa dermoids report of two cases |
| topic | posterior fossa dermoid hyperdense dermoid magnetic resonance imaging |
| url | http://www.thieme-connect.de/DOI/DOI?10.1055/s-0039-3402594 |
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