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Malignant Fibrous Histiocytoma in the Infratemporal Fossa

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ÀÌ°æÈñ/Kyung Hee Lee Çã¹Î¼®/À̻Q/ÃÖ¼øö/ÀÌ°æÈñ/Çã¹Î¼®/À̻Q/ÃÖ¼øö/Min Suk Heo/Sam Sun Lee/Soon Chul Choi/Kyung Hee Lee/Min Suk Heo/Sam Sun Lee/Soon Chul Choi

Abstract

¼¶À¯¼º Á¶Á÷±¸Á¾ (fibrous histiocytoma)Àº ¼¶À¯¾Æ¼¼Æ÷, ±Ù¼¶À¯¾Æ¼¼Æ÷, Á¶Á÷±¸¼¼Æ÷, ¿ø½Ã°£
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¼¶À¯¼º Ȳ»ö À°Á¾(fibroxanthosarcoma), ¾Ç¼º Á¶Á÷±¸Á¾, ¿¬Á¶Á÷ÀÇ ¾Ç¼º °Å´ë ¼¼Æ÷Á¾µî ¿©·¯
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Malignant fibrous histiocytoma is one of the most common soft tissue sarcomas in
late adult life, but its incidence in oral and maxillofacial region is extremely rare. We
report a case of malignant fibrous histiocytoma which occurred in the infratemporal
fossa.
Conventional radiograph of this case showed an ill-defined radiolucent lesion in the
alveolar bone of the right maxillary first molar area, the lateral wall of the maxillary
sinus, and the ascending ramus of mandible.
MRI demonstrated a well defined mass of intermediate signal intensitiy in T1
weighted images but T2 weighted images showed two distinctive regions of different
characteristics. Upper portion of the lesion was of hyperintense signal but (at) lower
portion, the signal intensity decreased clearly, which might mean that this lesion(mass)
is composed of two different subtypes though it couldn't be confirmed by
histopathological examination. Biopsy was taken the lesion as only in the soft tissue of
the maxillary posterior alveolar region and confirmed the storiform-pleomorphic type of
malignant fibrous histiocytoma. Histopathological subtype was well consistent with the
relatively aggressive imaging findings of that region.
We expect more detailed analysis of the nature of malignant fibrous histiocytoma with
improvement of the imaging modality and the identification of the relationship between
diagnostic imaging and histopathologic findings.

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MFH; Infratemporal fossa; Imaging Modality;

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