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The Korean Journal of Pathology 1997;31(9): 891-894.
Mediastinal Hemangioma: Report of a case.
Jong Ok Kim, Bum Kyeong Kim, Kyoung Hee Kim, Dae Young Kang, Kwang Sun Suh
Department of Pathology, Chungnam National University College of Medicine, Taejon 301-131, Korea.
Benign hemangioma of the mediastinum is rare. This slowly growing tumor is described as well circumscribed, cystic, hemorrhagic tumor. Histologically it can be differentiated into capillary or cavernous form. We present a case of mediastinal hemangioma. A 20-year-old-man was presented with a slowly growing posterior mediastinal mass of 6 years duration, 8x6 cm in size. The mass was relatively well defined but focally invasive. Microscopically, it was differentiated into vessels of capillary, cavernous, and venous patterns. A solid cellular proliferation with inconspicuous capillary lumens was focally seen. The stroma between variable-sized vessels showed marked myxoid change associated with some smooth muscle bundles and adipose tissue. Ultrastructurally, areas of solid cellular proliferation showed formation of lumens. These lumens were lined by active endothelial cells showing plasmalemmal vesicles and Weibel-Palade bodies on the abluminal surface.
Key Words: Hemangioma; Posterior mediastinum; Weibel-Palade bodies
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