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노진혁,이병진,조옥자,박시룡 대한피부과학회 2003 大韓皮膚科學會誌 Vol.41 No.7
Angiosarcoma is a rare malignant tumor of endothelial cell origin. Histopathologically, varied differentiation may be observed even within the same tumor. Epithelioid angiosarcoma is one subset of poorly differentiated angiosarcoma which is a rare variant. We report a case of epithelioid angiosarcoma of the scalp in a 59-year-old man. The patient had a painful solitary, 2×3 cm sized, dome-shaped, firm, erythematous to purplish nodule with crust on the vertex of the scalp. Histopathologically, the tumor was chiefly composed of solid sheets of atypical epithelioid cells with prominent eosinophilic cytoplasm, a large vesicular nuclei, and occasional intracytoplasmic vacuoles. Well to moderately differentiated areas with irregular vascular channel-like structures lined by atypical hyperchromatic endothelial cells were also seen in the peripheral areas of the tumor. Immunohistochemically, the tumor cells were positive with CD31 which is sensitive marker of endothelial cell. (Korean J Dermatol 2003;41(7) : 971~973)
이나영,노진혁,조옥자,박시룡,송계용 대한피부과학회 2003 大韓皮膚科學會誌 Vol.41 No.7
Trichoblastoma is a benign cutaneous neoplasm that consists of follicular germinative cells. We report a case cf trichoblastoma in a 58-year-old man. The tumor was presented as a solitary symmetrical shaped pedunculated 5.0×4.0×2.0cm sized multilobular tumor on right lower leg for 2 years. Histopathologic examination showed well circumscribed dermal tumor composed of multilobular tumor islands of palisaded basaloid epithelial cells. The tumoral lobules were concentrically surrounded by hyalinized collagen bundles with fibroblasts. The overall architecture was reminiscent of hair bulbs. Cytokeratin 14 stain showed positive reaction, but cytokeratin 10 stain showed negative reaction. The tumor was completely excised with clear margin. No sign of recurrence has been noted until 9 months later. (Korean J Dermatol 2003;41(7) : 968~970)