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.
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Dahlin DC. Bone tumors: general aspects and data on 6221 cases, 3rd edn. Springfield: Thomas, 1981: 86.
Merryweather R, Middlemiss JH, Sanerkin NG. Malignant transformation of osteoblastoma. J Bone Joint Surg [Br] 1980; 62: 381.
Morton KS, Quenville NF, Beauchamp CP. Aggressive osteoblastoma. J Bone Joint Surg [Br] 1989; 71-B: 428.
Mitchell ML, Ackerman LV. Metastatic and pseudomalignant osteoblastoma: a report of two unusual cases. Skeletal Radiol 1986; 15: 213.
Seki T, Fukuda H, Ishii Y, Hanaoka H, Yatabe S, Takano M, Koide O. Malignant transformation of benign osteoblastoma. J Bone Joint Surg [Am] 1975; 57: 424.
Dorfman HD, Weiss SW. Borderline osteoblastic tumors: problems in the differential diagnosis of aggressive osteoblastoma and low-grade osteosarcoma. Semin Diagn Pathol 1984; 1: 215.
Schajowicz F, Lemos C. Malignant osteoblastoma. J Bone Joint Surg [Br] 1976; 58: 202.
Zimmer WD, Berquist T, McLeod RA, Sim FH, Pritchard DJ, Shieves TC, Wold LE, May GR. Bone tumors: magnetic resonance imaging versus computed tomography. Radiology 1985; 155: 709.
Crim JR, Mirra JM, Eckardt JJ, Seeger L. Widespread inflammatory response to osteoblastoma: the flare phenomenon. Radiology 1990; 177: 835.
Bertoni F, Unni KK, McLeod RA, Dahlin DC. Osteosarcoma resembling osteoblastoma. Cancer 1985; 55: 416.
Mirra JM. Bone tumors: diagnosis and treatment. Philadelphia: Lippincott, 1980; 117.
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Members of the Group for the Image Diagnosis of Craniofacial Disorders
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Ueno, H., Ariji, Ei., Tanaka, T. et al. Imaging features of maxillary osteoblastoma and its malignant transformation. Skeletal Radiol. 23, 509–512 (1994). https://doi.org/10.1007/BF00223079
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DOI: https://doi.org/10.1007/BF00223079