title: Subcutaneous solitary fibrous tumor.
abstract: We describe a unique case of subcutaneous solitary fibrous tumor (SFT) in a 56-year-old female patient. The patient had been aware of a painless soft mass in her back for ten years. The lesion was surgically excised. Histological examination revealed that the well-defined mass was composed of a proliferation of spindle-shaped fibroblastic cells and polygonal cells embedded in a fibrous matrix corresponding to the so-called "patternless pattern". A prominent pericytomatous pattern (hemangiopericytoma-like structures), focal myxoid changes, and thick hyalinized collagen fibers were also observed. Immunohistochemical stainings for CD34 and bcl-2 were positive in the tumor cells. These features are compatible with SFT. We suggest that SFT should be included in the differential diagnosis of subcutaneous spindle cell tumors.
authors.affiliation: Department of Dermatology, School of Medicine, Fukuoka University, 7-45-1, Nanakuma, Jonan-ku, Fukuoka 814-0180, Japan.
authors.forename: Yuichi
authors.initials: Y
authors.lastname: Yoshida
authors.forename: Yumiko
authors.initials: Y
authors.lastname: Kubota
authors.forename: Takahiro
authors.initials: T
authors.lastname: Yamaguchi
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Iwasaki
authors.forename: Juichiro
authors.initials: J
authors.lastname: Nakayama
mesh_terms: D018952:Antigens, CD34 / Q000378:metabolism; D001415:Back; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D007150:Immunohistochemistry; D008875:Middle Aged; D018218:Neoplasms, Fibrous Tissue / Q000175:diagnosis* / Q000473:pathology / Q000601:surgery; D019253:Proto-Oncogene Proteins c-bcl-2 / Q000378:metabolism; D012983:Soft Tissue Neoplasms / Q000175:diagnosis* / Q000473:pathology / Q000601:surgery
chemical_list: D018952:Antigens, CD34; D019253:Proto-Oncogene Proteins c-bcl-2