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Solitary fibrous tumor with malignant potential arising in sublingual gland
Author(s) -
Ogawa Ikuko,
Sato Sunao,
Kudo Yasusei,
Miyauchi Mutsumi,
Sugiyama Masaru,
Suei Yoshikazu,
Takata Takashi
Publication year - 2003
Publication title -
pathology international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.73
H-Index - 74
eISSN - 1440-1827
pISSN - 1320-5463
DOI - 10.1046/j.1440-1827.2003.01425.x
Subject(s) - pathology , cd34 , solitary fibrous tumor , vimentin , lesion , myoepithelioma , histiocyte , immunohistochemistry , metastasis , hemangiopericytoma , sublingual gland , myoepithelial cell , salivary gland , medicine , anatomy , biology , cancer , stem cell , genetics
A rare case is described of a solitary fibrous tumor (SFT) with malignant potential arising in the sublingual gland. A 59‐year‐old man presented with a 4‐month history of a slowly enlarging painless mass in the center of the floor of the mouth. The tumor was a well‐demarcated, firm mass with a multicystic lesion. The tumor exhibited highly cellular areas of spindle cells with patternless architecture alternating with hypocellular areas. The tumor cells were positive for CD34 and bcl‐2 as well as vimentin, and negative for epithelial, myogenic, neurogenic and histiocytic markers. The tumor cells formed multiple satellite nodules around dilated ducts in the multicystic lesion, indicating infiltrative growth. In addition, areas exhibiting higher cellularity with increased mitoses were noticed in the satellite nodules, although cellular atypia was not obvious. These findings led to a final diagnosis of SFT with malignant potential. There has been no recurrence or metastasis for 27 months after the surgery. Solitary fibrous tumor of the salivary gland must be differentiated from various spindle cell neoplasms including myogenic, peripheral nerve sheath, fibroblastic and fibro‐histiocytic spindle cell neoplasms, hemangiopericytoma and myoepithelioma. In addition to characteristic morphological features, an immunohistochemical positivity for CD34 and bcl‐2 may aid in the diagnosis of SFT.