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Giant retroperitoneal hemangiopericytoma.
  1. S. C. Chan,
  2. C. M. Lee,
  3. Y. B. Ng,
  4. C. H. Tsai
  1. Department of Diagnostic Radiology, Chang Gung Memorial Hospital, Keelung, Taiwan, ROC.


    Hemangiopericytomas are rare vascular tumours that are derived from pericytes. Retroperitoneal hemangiopericytomas are usually bulky but clinically silent when diagnosed because of their slow rate of growth. A 49-year-old man, who presented with only vague symptoms of abdominal fullness for several months, was found on computed tomography to have a huge well-defined mass with areas of low attenuation and well-enhanced septa. The tumour was successfully resected and was confirmed to be a malignant retroperitoneal hemangiopericytoma. It measured 30 cm in the greatest dimension. We are prompted to present this case as it is believed to be the largest tumour reported to date.

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