A CASE OF RETROPERITONEAL LIPOSARCOMA WITH DISAPPEARANCE OF A LIVER CYST

Abstract

We report a case of retroperitoneal liposarcoma with disappearance of a liver cyst.
A 71-year-old woman visited our hospital with abdominal fullness and vomiting.
Six years previously, she had been found to have a liver cyst, 12×9 cm in size. CT scan and MRI revealed a huge retroperitoneal tumor, and a liver cyst was not detected. The tumor was resected with the spleen, 6.4 kg in weight and 32×30×14 cm in size. During the operation, a liver cyst was not encountered. Upon pathological examination of the resected specimens, a mucinous, partially dedifferentiated type of liposarcoma was diagnosed.
In this case, it was thought that the liver cyst had disappeared because of necrosis or ischemic changes of secretory cells by increased pressure resulting from a large retroperitoneal tumor.