Korean J Radiol.  2013 Apr;14(2):213-217. 10.3348/kjr.2013.14.2.213.

Follicular Dendritic Cell Sarcoma of the Omentum: Multidetector Computed Tomography Findings

• Chien JC
• Lao WT
• Chen CL
• Chan WP

• KMID: 1482779
• DOI: http://doi.org/10.3348/kjr.2013.14.2.213

Abstract

We report computed tomography (CT) findings for a rare case of follicular dendritic cell sarcoma of the greater omentum from a 47-year-old female patient. The tumor presented ash a palpable mass lesion in the umbilical region for the last two months. Multidetector CT scan of the abdomen showed a 14-cm soft-tissue mass with calcification and necrosis within the greater omentum. As a result, a follicular dendritic cell sarcoma should be considered in the differential diagnosis of a solitary omentum mass, especially one with coarse and chunk-like calcifications.

Keyword

Computed tomography; Follicular dendritic cell sarcoma; Greater omentum; Sarcoma

MeSH Terms

Dendritic Cell Sarcoma, Follicular/pathology/*radiography
Female
Humans
Middle Aged
Multidetector Computed Tomography/*methods
Omentum/pathology/*radiography
Peritoneal Neoplasms/pathology/*radiography

Figure

• 

  Fig. 1 Follicular dendritic cell sarcoma in 47-year-old woman. A. Precontrast CT scan in axial plane displays coarse chunk-like calcification within tumor. B. Post-contrast CT scan of whole abdomen in coronal plane reveals heterogeneously enhanced soft-tissue mass below stomach (arrow). C. Coronal postcontrast CT scan shows relationship between soft-tissue mass and transverse colon (arrow). D. Sagittal postcontrast CT scan shows tumor mass draped below transverse colon (arrow). E. Coronal maximum intensity projection image shows engorged right gastroepiploic vessels (arrow) with branches to tumor. F. Gross specimen of tumor shows well encapsulated, fleshy mass from greater omentum. G. Tumor is mainly composed of spindle cells in storiform and whorl arrangement. Varying numbers of lymphocytes admixed in tumor tissue are shown (H&E, original × 200). H. Tumor cells are diffusely positive for CD21 by immunohistochemical study, indicating that the follicular dendritic cell origin of tumor cells (immunohistochemical study, counterstained with hematoxylin, original × 200).

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