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Èĺ¹¸·°­¿¡ ¹ß»ýÇÑ È°¸·À°Á¾ Retroperitoneal Synovial Sarcoma

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ä½Â¿Ï/Seoung-Wan Chae ½ÉÁ¤¿ø/¾ÈÇý°æ/À̹Îö/¹Ú¿µÀÇ/Jung-Weon Shim/Hye-Kyung Ahn/Min-Chul Lee/Young-Euy Park

Abstract

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Synovial sarcoma most commonly affects the extremities, especially the lower thigh
and knee region. However, a smaller number develops in a central or axial distribution,
an area which encompasses the trunk, orofacial, cervical and parapharyngeal regions.
The retroperitoneum is an extremely unusual site and has never been recorded in the
literature as primary a site for synovial sarcoma.
We investigated a case of retroperitoneal synovial sarcoma in a 40-year-old woman.
The specimen consisted of fragmented large bulky multinodular masses separated by
slit-like spaces. The tumor was 130 gm in weight. Microscopically, the tumor was
composed of nests of plump ovoid to polygonal shaped cells and bundles of spindle
shaped cells, which had vesicular nuclei and a small amount of cytoplasm. In some
areas, there were cleft like spaces and pseudoglandular structures lined by flat or
cuboidal cells. Myxoid change, collagen deposition, foci of calcification and osseous
metaplasia were also present.
Immunohistochemically, the polygonal cells and some of the spindle cells reacted
positively for keratin. The spindle cells, especially in the perivascular area were positive
for vimentin. S-100 protein and GFAP were negative in both type of cells.

Å°¿öµå

Retroperitoneal tumor; Synovial sarcoma;

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