Epithelioid

	Epithelioid Epithelioid may refer to: * Epithelioid cell, a cell that resembles epithelial cells * Epithelioid sarcoma, a soft tissue tumour * Epithelioid hemangioendothelioma, a vascular tumour occurring in the lining of blood vessels * Epithelioid blue nevus, a melanocytic nevus * Epithelioid sarcoma-like hemangioendothelioma, a group of vascular neoplasms * Epithelioid and spindle-cell nevus, a benign melanocytic lesion affecting the epidermis and dermis * Epithelioid hemangioma Epithelioid may refer to: * Epithelioid cell, a cell that resembles epithelial cells * Epithelioid sarcoma, a soft tissue tumour * Epithelioid hemangioendothelioma, a vascular tumour occurring in the lining of blood vessels * Epithelioid blue nevus ... * Epithelioid cell histiocytoma, a skin condition similar to dermatofibroma External links {{disambig ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
picture info	Epithelioid Cell According to a common point of view epithelioid cells (also called epithelioid histiocytes) are derivatives of activated macrophages resembling epithelial cells. Structure and function Structurally, epithelioid cells (when examined by light microscopy after stained with hematoxylin and eosin), are elongated, with finely granular, pale eosinophilic (pink) cytoplasm, and central, ovoid nuclei (oval or elongate), which are less dense than that of a lymphocyte. They have indistinct shape and often appear to merge into one another, forming aggregates known as giant cells. When examined by transmission electron microscopy in epithelioid cells in the field of Golgi lamellar complex are taped not only zonated, but also sleek vesicles with dense center, and also great many (more than 100) large granulas with diameters up to 340 nm and with finegranular matrix more light than in macrophage granulas, sometimes with perigranular halo. “The most prominent feature of these cells is the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Epithelioid Sarcoma Epithelioid sarcoma is a rare soft tissue sarcoma arising from mesenchymal tissue and characterized by epithelioid-like features. It accounts for less than 1% of all soft tissue sarcomas. It was first clearly characterized by F.M. Enzinger in 1970. It commonly presents itself in the distal limbs (fingers, hands, forearms, or feet) of young adults as a small, soft mass or a series of bumps. A proximal version has also been described, frequently occurring in the upper extremities. Rare cases have been reported in the pelvis, vulva, penis, and spine. Histologically, epithelioid sarcoma forms nodules with central necrosis surrounded by bland, polygonal cells with eosinophilic cytoplasm and peripheral spindling. Epithelioid sarcomas typically express vimentin, cytokeratins, epithelial membrane antigen, and CD34, whereas they are usually negative for S100, desmin, and FLI1 (FLI-1). They typically stain positive for CA125. Epithelioid sarcoma most commonly strikes young adults, yet no ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Epithelioid Hemangioendothelioma Epithelioid hemangioendothelioma (eHAE) is a rare tumor, first characterized by Sharon Weiss and Franz Enzinger in 1982 that both clinically and histologically is intermediate between angiosarcoma and hemangioma. However, a distinct, disease-defining genetic alteration recently described for EHE indicates that it is an entirely separate entity from both angiosarcoma and hemangioma. EHE is a soft tissue sarcoma and is generally considered a vascular cancer insofar as the ‘lesional’ cells have surface markers typical of endothelial cells (cells lining the interior of blood vessels). EHE was originally described as occurring most commonly in the veins of the extremities (arms and legs) and two organs, the liver and lungs. It has since been described in organs throughout the body. In addition to liver and lungs, bones and skin have been the most frequent organs. Before the initial description of Weiss, the tumor had been reported under a variety of other names, including histiocy ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Epithelioid Blue Nevus A blue nevus is a type of coloured mole, typically a single well-defined blue-black bump. The blue colour is caused by the pigment being deep in the skin. Diagnosis is by visualisation and dermoscopy. A biopsy is sometimes performed, or the whole lesion surgically removed. The outcome is generally good but there is a small chance of cancerous transformation. Differential diagnosis includes dermatofibroma and melanoma. Blue nevi are more common in females than males. It was first studied in 1906 by Tièche, a student of Josef Jadassohn. Classification Blue nevi may be divided into the following types: * A ''patch blue nevus'' (also known as an "acquired dermal melanocytosis", and "dermal melanocyte hamartoma") is a cutaneous condition characterized by a diffusely gray-blue area that may have superimposed darker macules. * A ''blue nevus of Jadassohn–Tièche'' (also known as a "common blue nevus", and "nevus ceruleus") is a cutaneous condition characterized by a steel-bl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Epithelioid Sarcoma-like Hemangioendothelioma Hemangioendotheliomas are a family of vascular neoplasms of intermediate malignancy. Signs and symptoms They have been described as masses that fall between a hemangioma and angiosarcoma. They are vascular tumors that commonly present with an enlarging mass and most commonly involve the lungs, liver, and musculoskeletal system, although many other body sites have been reported, including the head and neck, intestines, lymph nodes, pleura, retroperitoneum, heel, stomach. Cause Possibly Bartonella spp bacteraemia Diagnosis Classification Hemangioendotheliomas may be classified as: * ''Epithelioid hemangioendothelioma'' is an uncommon vascular tumor of intermediate malignancy that was first described by Steven Billings, Andrew Folpe, and Sharon Weiss in 2003. These tumors are so named because their histologic appearance resembles a proliferation of epithelioid cells, with polygonal shape and eosinophilic cytoplasm. * ''Composite hemangioendothelioma'' is a low-grade angiosarcoma ty ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Epithelioid And Spindle-cell Nevus Epithelioid may refer to: * Epithelioid cell, a cell that resembles epithelial cells * Epithelioid sarcoma, a soft tissue tumour * Epithelioid hemangioendothelioma, a vascular tumour occurring in the lining of blood vessels * Epithelioid blue nevus, a melanocytic nevus * Epithelioid sarcoma-like hemangioendothelioma Hemangioendotheliomas are a family of vascular neoplasms of intermediate malignancy. Signs and symptoms They have been described as masses that fall between a hemangioma and angiosarcoma. They are vascular tumors that commonly present with an enl ..., a group of vascular neoplasms * Epithelioid and spindle-cell nevus, a benign melanocytic lesion affecting the epidermis and dermis * Epithelioid hemangioma * Epithelioid cell histiocytoma, a skin condition similar to dermatofibroma External links {{disambig ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Epithelioid Hemangioma Epithelioid may refer to: * Epithelioid cell, a cell that resembles epithelial cells * Epithelioid sarcoma, a soft tissue tumour * Epithelioid hemangioendothelioma, a vascular tumour occurring in the lining of blood vessels * Epithelioid blue nevus, a melanocytic nevus * Epithelioid sarcoma-like hemangioendothelioma, a group of vascular neoplasms * Epithelioid and spindle-cell nevus Epithelioid may refer to: * Epithelioid cell, a cell that resembles epithelial cells * Epithelioid sarcoma, a soft tissue tumour * Epithelioid hemangioendothelioma, a vascular tumour occurring in the lining of blood vessels * Epithelioid blue nevus ..., a benign melanocytic lesion affecting the epidermis and dermis * Epithelioid hemangioma * Epithelioid cell histiocytoma, a skin condition similar to dermatofibroma External links {{disambig ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]