MR imaging of orbital inflammatory pseudotumors with extraorbital extension

Ja Lee Eun, Lyung Jung So, Soo Kim Bum, Jin Ahn Kook, Joo Kim Young, Kyung Jung Ae, Sub Park Chan, Soon Young Song, Hyuck Park Noh, Sung Kim Mi

Research output: Contribution to journalReview articlepeer-review

36 Scopus citations

Abstract

Objective: To demonstrate a variety of MR imaging findings of orbital inflammatory pseudotumors with extraorbital extension. Materials and Methods: We retrospectively reviewed the MR features of five patients, who were diagnosed clinically and radiologically as having an orbital inflammatory pseudotumor with extraorbital extension. Results: The types of orbital pseudotumors were a mass in the orbital apex (n = 3), diffuse form (n = 2), and myositis (n = 1). The extraorbital extension of the orbital pseudotumor passed through the superior orbital fissure in all cases, through the inferior orbital fissure in two cases, and through the optic canal in one case. The orbital lesions extended into the following areas: the cavernous sinus (n = 4), the middle cranial fossa (n = 4), Meckel's cave (n = 2), the petrous apex (n = 2), the clivus (n = 2), the pterygopalatine fossa and infratemporal fossa (n = 2), the foramen rotundum (n = 1), the paranasal sinus (n = 1), and the infraorbital foramen (n = 1). On MR imaging, the lesions appeared as an isosignal intensity with gray matter on the T1-weighted images, as a low signal intensity on the T2-weighted images and showed a marked enhancement on the post-gadolinium-diethylene triamine pentaacetic acid (post-Gd-DTPA) T1-sequences. The symptoms of all of the patients improved when they were given high doses of steroids. Three of the five patients experienced a recurrence. Conclusion: MR imaging is useful for demonstrating the presence of a variety of extraorbital extensions of orbital inflammatory pseudotumors.

Original languageEnglish
Pages (from-to)82-88
Number of pages7
JournalKorean Journal of Radiology
Volume6
Issue number2
DOIs
StatePublished - 2005

Keywords

  • Orbit, inflammation
  • Orbit, MR
  • Orbit, Pseudotumor

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