lymphangioma/ärttörne

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Malignant endothelial neoplasm arising in the area of lymphangioma: immunohistochemical and ultrastructural observation.

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This report presents a rare malignant endothelial neoplasm which arose at the site of a pre-existing lymphangioma. The lymphangioma was located on the right buccal mucosa, and the malignant neoplasm arose 17 years after irradiation of the initial tumor. Clinical, light microscopic and

Acquired progressive lymphangioma as a flat erythematous patch on the abdominal wall of a child.

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An erythematous patch was noted on the abdominal wall of an 8-year-old boy. The lesion showed a prolonged initial clinical course, followed by rapid later growth, finally reaching 3.7 X 7.0 cm in size over four years. Despite the harmless clinical appearance, the lesion was histologically

Splenic lymphangioma with papillary endothelial proliferation: a case report and review of the literature.

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A 76-year-old man complained of difficulty breathing. A solitary mass was found in the spleen by ultrasonography and the tumor was excised. Grossly, the tumor was 3.9 x 2.9 cm in size, solid and brownish in color. A stellate scar-like fibrosis was observed in the center of the tumor. Histologically,

Benign lymphangioendothelioma.

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We have studied eight cases of an acquired lymphatic endothelial lesion for which we propose the name "benign lymphangioendothelioma." The lesions developed as solitary, slowly extending, erythematous macules and plaques, usually occurring on the extremities or the shoulders in adolescents or

Endothelial cell markers in vascular neoplasms: an immunohistochemical study comparing factor VIII-related antigen, blood group specific antigens, 6-keto-PGF1 alpha, and Ulex europaeus 1 lectin.

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Markers for endothelial cells including Ulex europaeus 1 lectin, blood group A, B, and H, and the prostaglandin metabolite 6-keto-PGF1 alpha were evaluated in paraffin secretions from formalin-fixed benign and malignant vascular neoplasms using a variety of immunohistochemical techniques, and

Benign lymphangioendothelioma.

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We describe a 40-year-old white man with a red-brown, indurated plaque on the proximal aspect of his right thigh. The lesion had been present since birth, and the patient had a 20-year clinical history of recurrent cellulitis in the same area. The histopathologic features of the lesion included

Morphological and cytogenetic studies of angiosarcoma in Stewart-Treves syndrome.

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A morphological and cytogenetic analysis of a multifocal angiosarcoma in a typical case of Stewart-Treves syndrome is reported. The morphological analysis indicated differentiation along both blood and lymph vessel endothelium lines. By light and electron microscopy there were areas with

Targetoid hemosiderotic hemangioma.

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We describe a vascular lesion with characteristic clinical and histologic features. The patients when first seen have a small, single, annular, targetoid-appearing lesion. Histologically it is a noncircumscribed vascular proliferation that may extend into the subcutaneous tissue. The earliest

QBEND/10, a new monoclonal antibody to endothelium: assessment of its diagnostic utility in paraffin sections.

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The immunoreactivity of a new monoclonal antibody to endothelium. QBEND/10, in formalin-fixed, paraffin-embedded sections from a variety of vascular and lymphatic tumours is described and compared to that of two other endothelial markers, von Willebrand factor and Ulex europaeus agglutinin, type 1.

CD31 immunoreactivity in mesenchymal neoplasms of the skin and subcutis: report of 145 cases and review of putative immunohistologic markers of endothelial differentiation.

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CD31 has recently been reported as a specific marker of endothelial differentiation among non-hematopoietic human neoplasms. In order to address this contention in particular regard to tumors of the skin and subcutis, the authors undertook a comparative study that surveyed 145 mesenchymal lesions.

Kaposiform hemangioendothelioma of infancy and childhood. An aggressive neoplasm associated with Kasabach-Merritt syndrome and lymphangiomatosis.

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We report the clinical and pathological features of nine distinctive, but relatively unknown, vascular tumors of infancy and childhood presenting as soft tissue masses often associated with locally aggressive disease, lymphangiomatosis and Kasabach-Merritt syndrome. The patients, four males and five

Angiosarcomas express mixed endothelial phenotypes of blood and lymphatic capillaries: podoplanin as a specific marker for lymphatic endothelium.

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Angiosarcomas apparently derive from blood vessel endothelial cells; however, occasionally their histological features suggest mixed origin from blood and lymphatic endothelia. In the absence of specific positive markers for lymphatic endothelia the precise distinction between these components has

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