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Case Rep Pathol. 2016;2016:4182026. doi: 10.1155/2016/4182026. Epub 2016 Sep 08.

Solitary Fibrous Tumor of the Sigmoid Colon Masquerading as an Adnexal Neoplasm.

Case reports in pathology

Laura Bratton, Rabih Salloum, Wenqing Cao, Aaron R Huber

Affiliations

  1. Department of Surgical Pathology, University of Rochester Medical Center, 601 Elmwood Avenue, Box 626, Rochester, NY 14642, USA.
  2. Department of Colorectal Surgery, University of Rochester Medical Center, 601 Elmwood Avenue, Rochester, NY 14642, USA.
  3. Department of Pathology, NYU Langone Medical Center, 550 1st Ave, Suite TH388, New York, NY 10016, USA.

PMID: 27672467 PMCID: PMC5031870 DOI: 10.1155/2016/4182026

Abstract

Solitary fibrous tumor is a rare, benign spindle cell neoplasm that was first described in the thoracic pleura. This tumor is now known to occur at many extrapleural sites. There are established criteria for the diagnosis of malignant solitary fibrous tumor including ≥4 mitotic figures per 10 high-power fields, increased cellularity, cytologic atypia, infiltrative margins, and/or necrosis. Although all solitary fibrous tumors have the potential to recur or metastasize, those with malignant histologic features tend to behave more aggressively. We report a case of solitary fibrous tumor, with malignant histologic features, in a 21-year-old woman which arose from the serosal surface of the sigmoid colon.

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