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Imaging features of maxillary osteoblastoma and its malignant transformation |
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| Authors: | Hiroshi Ueno D.D.S. Ei-ichiro Ariji D.D.S. Ph.D. Takemasa Tanaka D.D.S. Shigenobu Kanda D.D.S. Ph.D. Shin-ichiro Mori D.D.S. Ph.D. Masaaki Goto D.D.S. Ph.D. Akio Mizuno D.D.S. Ph.D. Haruo Okabe M.D. Ph.D. Takashi Nakamura D.D.S. Ph.D. |
| Affiliation: | (1) Department of Radiology, Nagasaki University School of Dentistry, Nagasaki, Japan;(2) Department of Oral and Maxillofacial Radiology, Faculty of Dentistry, Kyushu University, Fukuoka, Japan;(3) Department of Dental Radiology, Fukuoka Dental College, Fukuoka, Japan;(4) Department of Oral and Maxillofacial Surgery, Saga Medical Scholl, Saga, Japan;(5) First Department of Oral Surgery, Nagasaki University School of Dentistry, Nagasaki, Japan;(6) Department of Oral Pathology, Nagasaki University School of Dentistry, Nagasaki, Japan;(7) Department of Radiology, Nagasaki University School of Dentistry, 1-7-1 Sakamoto, 852 Nagasaki, Japan |
| Abstract: | We report two cases of osteoblastoma, one of them an unusual case in a 32-year-old woman in whom a maxillary tumor was confidently diagnosed as an osteoblastoma at the time of primary excision and subsequently transformed into an osteosarcoma 7 years after the onset of clinical symptoms. The other patient developed osteosarcoma arising in the maxilla, which was diagnosed 3 years after the primary excision and is very suggestive of malignant transformation in osteoblastoma. We present the radiological features, including computed tomographic and magnetic resonance imaging studies, of this unusual event of transformed tumor and compare imaging features of benign and dedifferentiated counterparts of this rare tumor complex.Members of the Group for the Image Diagnosis of Craniofacial Disorders |
| Keywords: | Bone tumor Osteoblastoma Malignant transformation CT MR imaging |
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