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KMID : 1103720180780050340
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Journal of the Korean Society of Radiology
2018 Volume.78 No. 5 p.340 ~ p.344
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Retroperitoneal Extraskeletal Osteosarcoma without Calcification Mimicking Pancreas Tumor: CT Imaging of a Case Report
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Kim Jung-Won
Bae Kyung-Eun
Park Kyeong-Mee
Kim Jae-Hyung
Jeong Myeong-Ja
Kim Soung-Hee
Kim Ji-Young
Kim Soo-Hyun
Kang Mi-Jin
Lee Ji-Hae
Kim Tae-Gyu
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Abstract
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Retroperitoneal extraskeletal osteosarcoma is a rare tumor. Typical imaging findings include a soft tissue mass accompanied with internal calcifications. The authors encountered a case involving a 44-year-old woman with a large retroperitoneal extraskeletal osteosarcoma, without calcification, that mimicked a pancreatic tumor. The present report highlights computed tomography features of retroperitoneal extraskeletal osteosarcoma, followed by a brief literature review. It is challenging for radiologists to diagnose retroperitoneal masses. However, in patients who present with large retroperitoneal masses, combined with clinical information including the elevation of serum alkaline phosphatase levels, retroperitoneal extraskeletal osteosarcoma should be considered in the differential diagnosis, even if the mass does not exhibit a gross calcification on the imaging.
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KEYWORD
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Retroperitoneal Space, Osteosarcoma, Ossification, Tomography, X-ray Computed
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