J Korean Radiol Soc.
2002 May;46(5):441-448. 10.3348/jkrs.2002.46.5.441.
Inflammatory Pseudotumor of the Extraorbital Head and Neck: CT and MR Imaging Findings
- Affiliations
-
- 1Department of Radiology, Kangnam General Hospital Public Corporation.
- 2Department of Radiology, Samsung Medical Center, Sungkyunkwan University School of Medicine.
- 3Department of Radiology, Kwangwon National University Hospital.
- KMID: 2200178
- DOI: http://doi.org/10.3348/jkrs.2002.46.5.441
Abstract
- PURPOSE
To determine the MR and CT imaging findings of inflammatory pseudotumor of the extraorbital head and neck.
MATERIALS AND METHODS
We reviewed the MR (n=10) and CT (n=9) imaging studies of 11 patients with this condition (M:F=5:6, age range: 35-75 years), analysing each case in terms of location, occupying space, signal intensity, intracranial involvement, degree of contrast enhancement and adjacent bone change. Follow-up images were obtained in nine cases, and the response of each patient to steroid treatment was reviewed.
RESULTS
Lesions involved the masticator space (n=8), the buccal space (n=6), the nasopharynx (n=5), the paranasal sinus (n=4), the parapharyngeal space (n=3), the prevertebral space (n=2), the orbit (n=2), the carotid space (n=2), the paravertebral space (n=1), parotid space (n=1), and the oral cavity (n=1). In ten of eleven cases, there was adjacent bone change. In three cases, the cavernous sinus was involved, and in two, the dura. One case involved both of them. At T2-weighted imaging, the lesions showed hypointensity in nine of ten cases; in four of nine, signal intensity was markedly low, and in no case was it diffusely high. In five of nine cases, the mass decreased in size after steroid therapy.
CONCLUSION
Inflammatory pseudotumor showed iso-to hypointensity at T2-weighted imaging. Lymphadenopathy was not apparent.
