نتایج جستجو برای: epithelioid

تعداد نتایج: 4113  

Journal: :Tumori 2007
Chiara Mignogna Sara Simonetti Giuseppe Galloro Luca Magno Rossella De Cecio Luigi Insabato

Angiosarcomas are uncommon malignant tumors of vascular endothelium that represent less than 1% of all sarcomas. The epithelioid variant of angiosarcomas is exceptionally rare, and the gastrointestinal tract is rarely involved. Angiosarcomas mainly involve skin and soft tissue and rarely occur in breast, liver, bone, and spleen. We present the case of a 30-year-old man who underwent an upper ga...

Journal: :Annals of diagnostic pathology 2012
José do Egypto Pereira Filho Daniele Meneses de Amorim Gloria Maria Maranhão Sweet Luiz Antonio Rodrigues de Freitas Paulo Roberto Fontes Athanazio Daniel Abensur Athanazio

Renal angiomyolipoma (AML) may present as rare variants such as epithelioid and AML with epithelial cysts posing difficulties for the diagnosis to the surgical pathologist. We report a case of a 46-year-old male patient presenting a 5-cm solid tumor in the lower pole of the left kidney, with cystic changes at cut surface. The tumor exhibited 95% of epithelioid cells with atypical nuclei. A smal...

Journal: :The Journal of Experimental Medicine 2003
Kenneth C. Smithburn Florence R. Sabin

1. A comparative study has been made of the cellular reactions induced by phosphatides from five strains of acid-fast bacilli. Each of these reactions is characterized principally by epithelioid cells and giant cells. 2. The phosphatides are first phagocytized by young connective tissue cells or monocytes. The lipoid is then dispersed into fine particles with the formation of classical epitheli...

2011
Alessandro Natali Gabriella Nesi Gianni Vittori Andrea Minervini Alessandro Franchi Simone Agostini Marco Carini Iacopo Menghetti

We report a rare case of atypical epithelioid hemangioma of the penis in a 42-year-old man with a painful penile dorsal nodule, first misdiagnosed on simple penile ultrasonography as Peyronie’s disease. Even though the patient underwent treatment, the lesion improved and a penile echo-color Doppler scan showed abundant vascularization. After local excision, the pathologic diagnosis was atypical...

Journal: :Medicina oral, patologia oral y cirugia bucal 2010
Manuel-Antonio Gordón-Núñez eonardo-Miguel-Madeira Silva Maria-Fernanda-Fernandes Lopes Sebastião-Fernandes de Oliveira-Neto Alexandre-Pinto Maia Hébel-Cavalcanti Galvão

The epithelioid hemangioendothelioma (EH) is an uncommon angiocentric neoplasm of borderline or intermediate malignant potential, between the hemangioma and conventional angiosarcoma. It is characterized by the proliferation of endothelial cells with epithelioid or histiocitóide morphology with vacuolated cytoplasm and occasional eosinophilic spindle cells. Shows potential for local recurrence ...

Journal: :Urology journal 2009
Miguel Angel Arrabal-Polo Miguel Arrabal-Martin Francisco Palao-Yago Antonio Jiménez-Pacheco Olga Fernanda Garcia-Galvis Armando Zuluaga-Gomez

Received August 2008 Accepted December 2008 INTRODUCTION Angiomyolipoma of the kidney has classically been considered as a tumor of the connective tissue composed of fat, vascular tissue, and smooth muscle. In most cases, it is a tumor with benign behavior that may appear sporadically or associated with tuberous sclerosis syndrome. Macroscopically, these tumors are greyish yellow in color, and ...

Journal: :Italian journal of gynaecology & obstetrics : official publication of the Societa italiana di ginecologia e ostetricia 2015
Basilio Pecorino Giuseppe Scibilia Antonio Galia Paolo Scollo

Perivascular epithelioid cell tumors (PEComas) represent a rare group of tumours with uncertain malignancy potential exhibiting an immunophenotype characterized by actin and Human Melanoma Black 45 (HMB45) immunoreactivity. Our case concerns about a rare malignant uterine perivascular epithelioid cell tumour diagnosed in a patient underwent to subtotal hysterectomy with unclear diagnosis, 12 ye...

2014
Hassadin BOONSRIROJ Kazunori KIMITSUKI Tetsuya AKAGI Chun-Ho PARK

A malignant epithelioid schwannoma of the oral cavity was diagnosed in an 8-year-old domestic short-hair cat. The mass was located in the gingiva of the upper left premolar to molar region and showed multinodular growth patterns. The mass comprised epithelioid cells arranged in densely packed sheets. Tumor cells had large, round to oval nuclei with prominent nucleoli and an abundant eosinophili...

2007
Batra

Renal Angiomyolipoma (AML) is a benign lesion with a variable admixture of fat cells, thick walled blood vessels, smooth muscle and polygonal epithelioid cells. The lesion can be diagnosed with certainty in the presence of all the components on fine needle aspiration, supported by CT findings. However the presence of predominant population of epithelioid cells with paucity or absence of other c...

Journal: :Bratislavske lekarske listy 2012
A De Stefano G Kulamarva L Citraro L Borgia A Croce

PROBLEMS/OBJECTIVES Malignant peripheral nerve sheath tumours are uncommon soft tissue tumours originating from Schwann cells or nerve sheath cells. Malignant epithelioid schwannoma is an aggressive variant of malignant peripheral nerve sheath tumour, and unfortunately is related with a high rate of recurrence and poor prognosis. METHODOLOGY In this study we present a rare case of malignant e...

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