Intradiploic epidermoid cyst with focal internal enhancement |
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| Authors: | Nambu Atsushi Imanishi Yoshimasa Iwasaki Yoshie Fujikawa Mitsuhiro Hayashi Tatsuo Shinagawa Toshihito Araki Tsutomu |
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| Affiliation: | (1) Department of Radiology, St. Marianna University Toyoko Hospital, Kosugi-cho, Nakahara-ku, Kawasaki 211-0063, Japan;(2) Department of Neurosurgery, St. Marianna University Toyoko Hospital, Kawasaki, Japan;(3) Department of Pathology, St. Marianna University Yokohama Seibu Hospital, Yokohama, Japan;(4) Department of Radiology, University of Yamanashi, Nakakoma, Yamanashi, Japan;(5) Present address: Department of Radiology, University of Yamanashi, 1110 Shimokawato, Tamaho-cho, Nakakoma, Yamanashi 409-3898, Japan |
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| Abstract: | ![]()
We report a case of intradiploic epidermoid cyst with focal internal enhancement. The patient was a 55-year-old woman presenting with right temporal head protrusion and head heaviness. Skull radiography and computed tomography demonstrated an expansile mass in the right diploic space. On magnetic resonance imaging, the mass showed makedly high signal T2-weighted images (T2WI) and intermediate to low signal on T1WI. On contrast-enhanced T1WI, there was nodular internal enhancement, which corresponded to neovascularity on pathology, as well as rim-like enhancement. It should be noted that internal enhancement, an indicator of malignant transformation, may be seen even in a benign epidermoid cyst. |
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| Keywords: | Epidermoid cyst MR imaging CT Enhancement |
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