hemangioendothelioma/ulex

Two thorium dioxide-induced murine hemangioendotheliomas, 42021 TCT and 44347 TST, were grown subcutaneously (for up to 22 and 15 passages respectively) or intracranially (single passage) and were adapted to culture as a monolayer and, in a limited fashion, in an organ culture system or in rotary

108 tumors reckoned in the file of the N. N. Petrov Research Institute of Oncology as vascular neoplasms were studied microscopically and histochemically. Malignant hemangioendotheliomas showed formation of vascular structures (a microscopic sign) and expression of specific markers of the

A case of a distinctive vascular neoplasm of the spleen in a 3-year-old boy is described. The tumor was characterized histologically by a biphasic growth pattern, with discrete nodular areas composed of atypical round, epithelioid cells with large nuclei and prominent nucleoli, and areas showing an

Six cases of spindle cell hemangioendothelioma (SCH) are presented with immunohistochemical and flow cytometric analyses. One case was associated with Maffucci's syndrome. All lesions were solitary or multifocal in the extremities, and prepresentation duration ranged from years to decades. One case

Epithelioid sarcoma (ES) and epithelioid hemangioendothelioma (EH) both occur preferentially in the soft tissues, and may be confused with one another microscopically. We compared 8 examples of each tumor immunohistochemically, using formalin-fixed tissue, the ABC method, unconjugated Ulex europaeus

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

The vascularization of 50 tumors of the central nervous system (CNS) including 17 meningiomas, 25 neuroectodermal tumors, i.e., astrocytomas, oligodendrogliomas, mixed gliomas, glioblastomas, medulloblastomas, seven metastatic carcinomas, and one malignant hemangioendothelioma were investigated

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.

The accurate immunohistochemical diagnosis of epithelioid angiosarcoma--as distinct from carcinomas and other epithelioid neoplasms--is hindered by the lack of endothelial-selective reagents that are both sensitive and specific. To evaluate the potential utility of an "epithelial-specific" and an

The clinicopathologic features of 15 cutanous hemangiomas having a distinctive and frequently pseudomalignant morphologic appearance are presented. There were 5 male and 9 female patients, whose ages at diagnosis ranged from 11 to 58 years (median 30.5). An angiomatous/pigmented, nontargetoid, flat,

The staining pattern of monoclonal antibody anti-HPCA-1 (CD-34) was studied in 95 cases of benign and malignant cutaneous vascular proliferations and compared with other vascular endothelium-associated antigenic markers in paraffin-embedded tissues. The proliferating vessels in 22 cutaneous

Angiomatous lesions of the lung are uncommon and not well characterized. We describe nine cases of a distinct lymphatic vascular lesion that we have termed "diffuse pulmonary lymphangiomatosis." Extrathoracic lymphangiomatous lesions were not identified. The patients comprised seven males and two