case_images: PMC4383276_01
case_images: Computed tomographic scan showing a large retroperitoneal mass with cystic and solid components.
case_images: CRIS2015-157613.001.jpg
case_images: PMC4383276_01_CRIS2015-157613.001.jpg
case_images: fig1
case_images: Computed tomographic scan (CT) showed a large retroperitoneal mass with cystic and solid components (Figure 1).
case_images: The gross specimen of a well-encapsulated 21 x 15 x 13 cm retroperitoneal mass.
case_images: CRIS2015-157613.002.jpg
case_images: PMC4383276_01_CRIS2015-157613.002.jpg
case_images: fig2
case_images: The patient underwent a laparotomy and resection of a well-encapsulated 21 x 15 x 13 cm retroperitoneal mass (Figure 2).
case_images: High power image of the tumor with multinucleated tumor cells and atypical mitotic figure. Image provided by Martine C McManus, MD.
case_images: CRIS2015-157613.003.jpg
case_images: PMC4383276_01_CRIS2015-157613.003.jpg
case_images: fig3
case_images: Pathology determined that the mass was most consistent with a primary retroperitoneal mucinous tumor (PRMT) with an associated invasive moderate-to-poorly differentiated adenocarcinoma (Figure 3).