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Recurrence of Retroperitoneal Liposarcoma: Imaging Findings and Growth Rates at Follow-Up CT

¹ Department of Radiology and Center for Imaging Science, Samsung Medical Center, Sungkyunkwan University School of Medicine, 50, Ilwon-Dong, Kangnam-Ku, Seoul 135-710, Korea.
² Department of Surgery, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea.
³ Department of Pathology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea.

OBJECTIVE. The purpose of this study was to evaluate the CT features and growth rates of recurrent retroperitoneal liposarcoma on follow-up CT scans.

CONCLUSION. Retroperitoneal liposarcoma frequently recurs asymptomatically within 2 years, usually within 6 months–2 years, of the initial surgical resection. The CT features of recurrent liposarcoma are similar to those of the initial manifestation; recurrent liposarcoma shows rapid growth, with a mean tumor volume doubling time of 98 days (range, 46–151 days; median, 104 days).

Keywords: CT • oncologic imaging • recurrence • retroperitoneal liposarcoma • tumor growth rates

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