Solitary Fibrous Tumor of the Sigmoid Colon Masquerading as an Adnexal Neoplasm.
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.
Department of Surgical Pathology, University of Rochester Medical Center, 601 Elmwood Avenue, Box 626, Rochester, NY 14642, USA.
Laura
L
Bratton
Department of Colorectal Surgery, University of Rochester Medical Center, 601 Elmwood Avenue, Rochester, NY 14642, USA.
Rabih
R
Salloum
Department of Pathology, NYU Langone Medical Center, 550 1st Ave, Suite TH388, New York, NY 10016, USA.
Wenqing
W
Cao
Department of Surgical Pathology, University of Rochester Medical Center, 601 Elmwood Avenue, Box 626, Rochester, NY 14642, USA.
Aaron R
0000-0003-1286-7413
AR
Huber
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