نتایج جستجو برای: vascular tumor
تعداد نتایج: 628077 فیلتر نتایج به سال:
tumor angiogenesis shown by microvessel count (mvc) or microvessel density (mvd), is assessed by several studies as prognostic factor in some types of tumors, and also in colorectal carcinoma. this article is payed to correlation between clincopathologic factors and tumor angiogenesis. in this study, immunohistochemical techniques are used for vascular evaluation in specimens from twenty-nine c...
Tumor angiogenesis shown by Microvessel Count (MVC) or Microvessel Density (MVD), is assessed by several studies as prognostic factor in some types of tumors, and also in colorectal carcinoma. This article is payed to correlation between clincopathologic factors and tumor angiogenesis. In this study, immunohistochemical techniques are used for vascular evaluation in specimens from twenty-nine c...
Background & Aim: Retinoblastoma is the most frequent intra-ocular tumor in childhood. The tumor has both endophytic and exophytic patterns of growth. After enucleation, the pathologist is called on to evaluate risk of further growth for prophylactic therapy. Invasion of the choroid or optic nerve are risk factors for developing metastases, but occasionally, metastatic or locally invasive t...
Background: Angioleiomyomas are rare tumors arising from vascular tissue that can occasionally present in the hand.Reports of angioleiomyomas in this location are highly limited. Here, we describe the presentation and outcomes of aseries of cases of angioleiomyomas.Methods: A retrospective case review of five patients with angioleiomyomas arising in the hand was performed. Pat...
Most common tumors of the spleen are hematologic and lymphoid malignancies. Non-lymphoid and non-hematologic tumors of the spleen are very rare, the most common of which are vascular tumors. This group of tumors in the spleen is composed of heterogeneous tumors such as hemangioma, angioendothelioma (AE), littoral cell angioma, and angiosarcoma. There are several histologic forms of AE such as e...
Littoral cell angioma is a splenic vascular tumor of splenic sinus lining cells that is considered benign in general. This report describes a case of littoral cell angioma with no malignant histological features. The lesion is composed of anastomosing vascular channels resembling splenic sinus; they are lined by endothelial cells which show mitotic activity very rare. Immunohistochemically, ...
introduction: colorectal carcinoma is a main health problem in many countries and the third common cancer in iran. this malignancy at present is the most curable carcinoma of gastrointestinal tract. variation in the expression of the proteins produced by p53, p21, p16, e-cadherin, and β-catenin genes have been noted in this malignancy and may be important in the prognosis and therapeutic respon...
Background & objective: Hemangiopericytoma is an uncommon vascular tumor derived from the pericytes of Zimmermann. . The most common location of the tumor is pelvic retroperitoneum and musculoskeletal system of the lower extremities. It is rarely seen in the head and neck area. In addition, only 0.8% to 3% of all orbital tumors and less than 5 % of primary sinonasal tumors are primary hemangiop...
objectives: epithelial-mesenchymal transition (emt) is a fundamental stage in cancer metastasis and the presence of vascular invasion is a strong indication of the spread of the malignant tumor cells. regulation of the emt is a complex process in which several different transcription factors are involved. eomesodermin (eomes) as a member of the t-box gene family is an important component in the...
most common tumors of the spleen are hematologic and lymphoid malignancies. non-lymphoid and non-hematologic tumors of the spleen are very rare, the most common of which are vascular tumors. this group of tumors in the spleen is composed of heterogeneous tumors such as hemangioma, angioendothelioma (ae), littoral cell angioma, and angiosarcoma. there are several histologic forms of ae such as e...
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