Retroodontoid Pseudotumor Related to Development of Myelopathy Secondary to Atlantoaxial Instability on Os Odontoideum
Retroodontoid pseudotumor (ROP) is a nonneoplasic lesion of unknown etiology, commonly associated with inflammatory conditions, and the term of pannus is usually used. Less frequently, ROP formation can develop with other noninflammatory entities, with atlantoaxial instability as most accepted patho...
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| Format: | Article |
| Language: | English |
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Wiley
2018-01-01
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| Series: | Case Reports in Radiology |
| Online Access: | http://dx.doi.org/10.1155/2018/1658129 |
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| author | M. Hamard S. P. Martin S. Boudabbous |
| author_facet | M. Hamard S. P. Martin S. Boudabbous |
| author_sort | M. Hamard |
| collection | DOAJ |
| description | Retroodontoid pseudotumor (ROP) is a nonneoplasic lesion of unknown etiology, commonly associated with inflammatory conditions, and the term of pannus is usually used. Less frequently, ROP formation can develop with other noninflammatory entities, with atlantoaxial instability as most accepted pathophysiological mechanism for posttraumatic or degenerative ROP. As it can clinically and radiologically mimic a malignant tumor, it is paramount for the radiologist to know this entity. Magnetic resonance imaging is the modality of choice to reveal the possible severe complication of ROP in the form of a compressive myelopathy of the upper cervical cord. The purpose of the surgical treatment is the regression or complete disappearance of ROP, with posterior decompression by laminectomy and posterior C1-C2 or occipitocervical fixation. We present the case of an elderly patient with retroodontoid soft tissue mass secondary to a chronic atlantoaxial instability on os odontoideum, an extremely rare cause of ROP. The patient developed a posttraumatic cervical myelopathy related to the decompensation of this C1-C2 instability responsible for the formation of a compressive ROP. We will overview the retroodontoid pseudotumor and its differential diagnosis. |
| format | Article |
| id | doaj-art-fdd0aa77603f4d0cb6c9966fd61c1cd1 |
| institution | Kabale University |
| issn | 2090-6862 2090-6870 |
| language | English |
| publishDate | 2018-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Case Reports in Radiology |
| spelling | doaj-art-fdd0aa77603f4d0cb6c9966fd61c1cd12025-02-03T01:20:03ZengWileyCase Reports in Radiology2090-68622090-68702018-01-01201810.1155/2018/16581291658129Retroodontoid Pseudotumor Related to Development of Myelopathy Secondary to Atlantoaxial Instability on Os OdontoideumM. Hamard0S. P. Martin1S. Boudabbous2Department of Imaging and Medical Information Sciences, Division of Radiology, Geneva University Hospitals, Geneva, SwitzerlandDepartment of Imaging and Medical Information Sciences, Division of Radiology, Geneva University Hospitals, Geneva, SwitzerlandDepartment of Imaging and Medical Information Sciences, Division of Radiology, Geneva University Hospitals, Geneva, SwitzerlandRetroodontoid pseudotumor (ROP) is a nonneoplasic lesion of unknown etiology, commonly associated with inflammatory conditions, and the term of pannus is usually used. Less frequently, ROP formation can develop with other noninflammatory entities, with atlantoaxial instability as most accepted pathophysiological mechanism for posttraumatic or degenerative ROP. As it can clinically and radiologically mimic a malignant tumor, it is paramount for the radiologist to know this entity. Magnetic resonance imaging is the modality of choice to reveal the possible severe complication of ROP in the form of a compressive myelopathy of the upper cervical cord. The purpose of the surgical treatment is the regression or complete disappearance of ROP, with posterior decompression by laminectomy and posterior C1-C2 or occipitocervical fixation. We present the case of an elderly patient with retroodontoid soft tissue mass secondary to a chronic atlantoaxial instability on os odontoideum, an extremely rare cause of ROP. The patient developed a posttraumatic cervical myelopathy related to the decompensation of this C1-C2 instability responsible for the formation of a compressive ROP. We will overview the retroodontoid pseudotumor and its differential diagnosis.http://dx.doi.org/10.1155/2018/1658129 |
| spellingShingle | M. Hamard S. P. Martin S. Boudabbous Retroodontoid Pseudotumor Related to Development of Myelopathy Secondary to Atlantoaxial Instability on Os Odontoideum Case Reports in Radiology |
| title | Retroodontoid Pseudotumor Related to Development of Myelopathy Secondary to Atlantoaxial Instability on Os Odontoideum |
| title_full | Retroodontoid Pseudotumor Related to Development of Myelopathy Secondary to Atlantoaxial Instability on Os Odontoideum |
| title_fullStr | Retroodontoid Pseudotumor Related to Development of Myelopathy Secondary to Atlantoaxial Instability on Os Odontoideum |
| title_full_unstemmed | Retroodontoid Pseudotumor Related to Development of Myelopathy Secondary to Atlantoaxial Instability on Os Odontoideum |
| title_short | Retroodontoid Pseudotumor Related to Development of Myelopathy Secondary to Atlantoaxial Instability on Os Odontoideum |
| title_sort | retroodontoid pseudotumor related to development of myelopathy secondary to atlantoaxial instability on os odontoideum |
| url | http://dx.doi.org/10.1155/2018/1658129 |
| work_keys_str_mv | AT mhamard retroodontoidpseudotumorrelatedtodevelopmentofmyelopathysecondarytoatlantoaxialinstabilityonosodontoideum AT spmartin retroodontoidpseudotumorrelatedtodevelopmentofmyelopathysecondarytoatlantoaxialinstabilityonosodontoideum AT sboudabbous retroodontoidpseudotumorrelatedtodevelopmentofmyelopathysecondarytoatlantoaxialinstabilityonosodontoideum |