1/16. Epithelioid cell histiocytoma: a simulant of vascular and melanocytic neoplasms.Epithelioid cell histiocytoma (ECH) is an unusual and still poorly recognized variant of benign fibrous histiocytoma. Epithelioid cell histiocytoma differs from most benign fibrous histiocytomas in five important ways: the predominance of epithelioid cells, relative lack of secondary elements (such as giant cells, foamy, or hemosiderin-laden macrophages), relative sharp circumscription, prominent vascularity, and centering in the papillary dermis in most cases. A strong resemblance to melanocytic and vascular lesions has been noted, and a recent case was reported with features suggesting endothelial origin. Fifteen new cases of ECH, including one example of the rare deep cellular variant, are presented herein, with emphasis on features mimicking vascular and melanocytic neoplasms. Labeling with endothelial markers, including previously unreported CD-31 labeling, showed abundant vascular staining, which may be challenging to interpret, but which does not indicate an endothelial origin of ECH.- - - - - - - - - - ranking = 1keywords = histiocytoma (Clic here for more details about this article) |
2/16. Intraosseous epithelioid hemangioendothelioma of the mandible: a case report with an immunohistochemical study.Epithelioid hemangioma is the prototype of a group of vascular tumors characterized by epithelioid endothelial cells. hemangioendothelioma of bone is a rare lesion that constitutes less than 0.5% of primary malignant skeletal tumors. We report and discuss a case of epithelioid hemangioendothelioma arising intraosseously in the anterior portion of the mandible in a 76-year-old woman. The case was treated successfully by wide resection. Radiographically, the tumor mass showed osteolysis and expansion. Histologically, the tumor showed invasive and destructive growth, although it lacked frequent mitotic figures and severe atypia. On immunohistochemical study, tumor cells exhibited characteristics of mesenchymal and endothelial origin, i.e., strong to moderate immune reactivity against vimentin, factor viii-related antigen (F8RA), ulex europaeus agglutinin type 1 lectin (UEA-1), and CD 34, but not against keratin, epithelial membrane antigen (EMA) or S-100 protein (S100). The proliferating cell nuclear antigen (PCNA)-positive cell index was 27.5%. These pathological findings suggested a borderline malignant potential for this tumor. Thus, clinically, wide resection with or without dissection of regional lymph nodes is recommended.- - - - - - - - - - ranking = 0.0034180274340748keywords = hemangioma (Clic here for more details about this article) |
3/16. Giant fetal hepatic hemangioma. Case report and literature review.The purpose of this case report is to demonstrate the importance of prenatal imaging for treatment management of fetal giant hepatic hemangiomas. Prenatal ultrasound revealed an abdominal mass with several cystic areas and punctate calcifications in a fetus at 29 weeks' gestation. Doppler scans confirmed the highly vascular nature of the mass. In this case, ultrasound diagnosed the mass was of hepatic origin, while magnetic resonance imaging at 32 weeks' gestation was more equivocal with respect to the anatomy source of the lesion. Imminent hydrops caused by a rapidly enlarged liver tumor was sonographically demonstrated at 34 weeks' gestation. An elective C-section and immediate tumor resection was performed. At the age of 20 months the infant is thriving. This case supports the notion that the survival rates for giant hepatic hemangiomas improve when fetal hydrops is averted and specific pre- and postnatal treatment is applied based on correct prenatal imaging diagnostics.- - - - - - - - - - ranking = 0.020508164604449keywords = hemangioma (Clic here for more details about this article) |
4/16. Surgical treatment of a huge cavernous hemangioma surrounding the right coronary artery.hemangioma of the heart is an extremely rare benign cardiac tumor. A 61-year-old woman presented with a huge hemangioma on the right ventricle. The tumor was completely surrounding the right coronary artery. Under cardiopulmonary bypass, the right coronary artery was transected from the aortic sinus and the supplying arteries of the tumor were divided. The tumor was successfully resected, and the right coronary artery was reanastomosed to the aortic sinus.- - - - - - - - - - ranking = 0.017090137170374keywords = hemangioma (Clic here for more details about this article) |
5/16. Clinicopathological features of unusual vascular lesions of the pelvis, retroperitoneum and colon in females: a report of five cases and review of the literature.Vascular lesions comprise benign and malignant neoplasms as well as non-neoplastic conditions that may be located in various sites but only rarely in the pelvis or the retroperitoneum. In our study we describe five diverse and unusual cases of vascular lesions of the pelvis, retroperitoneum and colon in female patients: a case of retroperitoneal angiosarcoma, pelvic hemangioendothelioma, pelvic angiomyxoma, retroperitoneal lymphangioleiomyomatosis and a case of diffuse cavernous hemangiomatosis of the colon, with emphasis on their clinicopathological features and differential diagnosis. The recent literature on the subject is also briefly reviewed.- - - - - - - - - - ranking = 0.0034180274340748keywords = hemangioma (Clic here for more details about this article) |
6/16. Locally metastasizing vascular tumor. Spindle cell, epithelioid, or unclassified hemangioendothelioma?The authors report the case of a 2-year-old boy with a recurrent and locally metastasizing, spindle cell, vascular tumor with histiocytoid cells involving the skin, subcutaneous tissue, and muscle of the right forearm, the right distal radius and ulna, and multiple lymph nodes of the right axilla. Diagnoses of hemangioma, hemangiopericytoma, angiomatosis, spindle cell hemangioendothelioma, and malignant hemangioendothelioma were made on successive excision specimens. The soft tissue of the right arm became diffusely enlarged, and a severe syndrome developed that was similar to that described by Kasabach and Merritt. The limb was amputated above the elbow, the axillary lymph nodes were cleared, and a total dose of 6,000 centigrays axillary radiation was given. After operation, the kasabach-merritt syndrome resolved. Despite the lymph node metastases and multiple tissues involved, the patient has remained well 6 years after surgery. Although the tumor exhibited some of the histologic features of a spindle cell hemangioendothelioma, the low-grade aggressive behavior resembled that of an epithelioid hemangioendothelioma. The reported case cannot be classified into any of the recognized categories or subdivisions of vascular tumors.- - - - - - - - - - ranking = 0.0034180274340748keywords = hemangioma (Clic here for more details about this article) |
7/16. Intracranial tumor-forming papillary endothelial hyperplasia--a case report.This is a report of extensive intracranial papillary endothelial hyperplasia in a 12-day-old twin. The infant presented with progressive macrocephaly, anemia and hydrocephalus. An MR image showed a large (6 x 5 cm) mass in the right middle cranial fossa. Histologic examination of the resected mass revealed multifocal hemorrhage, organizing in a floridly papillary pattern, in proximity to numerous fibrous bands containing reactive fibroblasts, scattered chronic inflammatory cells and foci of extramedullary hematopoiesis. Although the pattern was complex, neither the papillary regions nor the other areas in the lesion displayed solid proliferations of endothelial cells to support a diagnosis of angiosarcoma. Subsequent to the resection, the infant continued to have hemostatic abnormalities and increasing hydrocephalus. Repeat scans showed a recurrent mass (4 x 4 cm). The child was placed on a protocol for chemotherapy treatment. We hypothesize that the hemorrhage and subsequent organization could have been superimposed upon a preexistent vascular malformation or hemangioma even though Masson's trichrome stain does not unequivocally demonstrate this feature. Most importantly, we would like to emphasize the dilemmas involved in diagnosis and management of this benign disorder.- - - - - - - - - - ranking = 0.0034180274340748keywords = hemangioma (Clic here for more details about this article) |
8/16. Congenital neck masses.neck masses are frequently encountered in children. Although they are most often due to past infections, they may be of congenital origin. A neck mass in an adult may also be benign and of congenital origin. Common congenital neck masses include thyroglossal duct cysts, branchial anomalies, cystic hygromas and hemangiomas. cysts, sinuses and fistulas may arise from the branchial apparatus.- - - - - - - - - - ranking = 0.0034180274340748keywords = hemangioma (Clic here for more details about this article) |
9/16. Cavernous hemangioma of the incus (an incidental finding).The incidental discovery of a cavernous hemangioma in an apparently normal incus found during pathological examination is reported. The incus had been removed during the course of a total osseous labyrinthectomy for delayed endolymphatic hydrops (DEH), and this unexpected finding noted. Although rare, hemangiomatous involvement of the temporal bone does occur and its manifestations are discussed. To date there have been no other reports of a hemangioma involving the incus solely.- - - - - - - - - - ranking = 0.023926192038524keywords = hemangioma (Clic here for more details about this article) |
10/16. Cervical carotid artery dissection secondary to malignant fibrous histiocytoma.A rare case of malignant fibrous histiocytoma of the cervical carotid artery is presented. Erosion of the vessel wall by this neoplasm resulted in dissection and pseudoaneurysm formation. The etiology and diagnosis of and the therapeutic alternatives for this unique disorder are discussed briefly.- - - - - - - - - - ranking = 0.625keywords = histiocytoma (Clic here for more details about this article) |
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