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Neoplasms of histiocytes and dendritic cells are rare, and their phenotypic and biological definition is incomplete. This chapter deals with the morphology of dendritic cell tumors as seen by pathologists and cytopathologists. It is divided into three sections: the follicular dendritic cell tumor, the interdigitating dendritic reticulum cell tumor and Langerhans cell histiocytosis. Currently used...
In many centers, on-site cytopathologists are not available during EUS-guided FNA (EUS-FNA) examinations. Often, endosonographers request that technologists assess the adequacy of FNA by gross inspection of the slides. To date, there has not been a study that assessed the accuracy of experienced technologists in predicting tissue sampling adequacy by gross inspection before cytologic staining.To assess...
Primary leiomyosarcoma of the pulmonary artery is a rare malignancy arising from the multipotential mesenchymal cell of the intima of the pulmonary artery. Due to its rarity and nonspecific clinical symptoms, the correct diagnosis and proper management are often delayed. Furthermore, it is frequently misdiagnosed as pulmonary embolism, mediastinal mass, pulmonary stenosis and lung cancer. Therefore,...
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