MR imaging of epithelial cysts of the oral and maxillofacial region

Miki Hisatomi, Jun-Ichi Asaumi, Hironobu Konouchi, Hiroshi Shigehara, Yoshinobu Yanagi, Kanji Kishi

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Abstract

The aim of the present study was to review the magnetic resonance (MR) appearance of primary epithelial cysts in order to distinguish the cysts from other possible lesions. MR images were obtained in 27 cases of epithelial cysts, including 7 odontogenic keratocysts, 3 dentigerous cysts, 1 glandular odontogenic cyst, 10 radicular cysts, 4 nasopalatine duct cysts, and 2 nasolabial cysts. In addition, contrast enhanced MR imagings were performed in 12 cases, including 3 odontogenic keratocysts, 1 dentigerous cyst, 1 glandular odontogenic cyst, and 7 radicular cysts. We obtained the following results on the basis of the above MR and contrast enhanced MR findings. (a) Odontogenic keratocysts had a predilection for intermediate-high signal intensity (SI) on T1-weighted images (WI) and heterogeneous low-high SI on T2WI. (b) Dentigerous cysts, glandular odontogenic cyst, radicular cysts and nasolabial cysts showed the same predilection with the SI, which were homogeneous intermediate SI on T1WI and homogeneous high SI on T2WI. (c) The MR images of the nasopalatine duct cysts, which showed homogeneous high SI on T1WI, were specific. (d) The Gd-T1WI would be useful in decisively differentiating odontogenic cysts, which showed rim-enhancement, from tumors consisting of solid components. In conclusion, we were able to obtain more information from the MR and contrast enhanced MR images than from conventional radiograph findings.

Original languageEnglish
Pages (from-to)178-182
Number of pages5
JournalEuropean Journal of Radiology
Volume48
Issue number2
DOIs
Publication statusPublished - Nov 2003

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Keywords

  • Dentigerous cysts
  • Diagnostic imaging
  • Glandular odontogenic cyst
  • Nasolabial cysts
  • Nasopalatine duct cysts
  • Odontogenic keratocysts
  • Radicular cysts

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging

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