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Solitary fibrous
tumor of the auditory canal.Arch
Pathol Lab Med 2004 Dec;128(12):e169-71.
Solitary
fibrous tumor (SFT) is an uncommon spindle cell neoplasm of
increasing incidence that was originally described to be of pleural
origin; however, more recently, SFT has been reported in
extrapleural sites, including the orbit, liver, salivary glands,
tongue, nose, paranasal sinuses, larynx, retroperitoneum, meninges,
and thyroid. The increase in the number of SFTs does not necessarily
mean increased incidence of this tumor but rather an increased
understanding of this tumor, especially recognition of this tumor in
extrapleural locations, which has been aided by immunohistochemical
analysis. We report a case of SFT in the auditory canal, which to
our knowledge has not been previously reported, as evident by
morphologic findings and immunophenotype.
A solitary fibrous
tumor in the external auditory meatus. Auris Nasus Larynx. 2004
Mar;31(1):65-7.
We herein
describe a rare case of a spindle-cell neoplasm arising in the
external auditory canal. A 38-year-old man presented with a
progressive swelling of the entrance of left external auditory
meatus. The patient underwent a surgical removal of the tumor. A
light microscopic study showed a spindle-cell proliferation with a
collagenous stroma and a staghorn-like vascular pattern. The tumor
cells were immunohistochemically positive for vimentin and CD34. The
tumor was thereafter diagnosed to be a solitary fibrous tumor (SFT).
SFTs most commonly occur in the pleura and are supposed to originate
from submesothelial connective tissue. Although, several cases of
extrapleural SFT have been reported, no SFT arising in the entrance
of left external auditory canal have ever been reported in the
literature. As a basically benign tumor, it occasionally relapses or
metastasizes after excision, and therefore a careful follow up is
necessary.
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