Glioblastoma (GBM) is the most lethal brain cancer with profound genomic alterations. While the bona fide tumor suppressor genes such as PTEN, NF1, and TP53 have high frequency of inactivating mutations, there may be the genes with GBM-suppressive roles for which genomic mutation is not a primary cause for inactivation. To identify such genes, we employed in vivo RNAi screening approach using t...

Normal differentiation and malignant transformation of human cells are characterized by specific changes in surface antigen phenotype. In the present study, we have defined six cell-surface antigens of human sarcomas and normal mesenchymal cells, by using mixed hemadsorption assays and immunochemical methods for the analysis of cultured cells and immunohistochemical staining for the analysis of...

Metastasis of epithelial cancer cells to distant sites is a particularly critical stage of cancer progression that typically marks the incurability of the disease. It is governed by a complex series of events including invasion and intravasation of tumor cells into the stroma and blood, respectively. Epithelial-to-mesenchymal transition (EMT), a phenotypic change marked by the loss of epithelia...

Perivascular epithelioid cell neoplasm/tumor (PEComa) was a relatively uncommon lesion of mesenchymal origin characterized by perivascular epithelioid cells with distinctive histological and immunohistochemical features. The occurrence in the sacral ligament was exceptional rare. Cytokeratin and epithelial membrane antigen (EMA) were considered as commonly useful epithelial markers to distingui...

The phenomenon of epithelial-mesenchymal transition (EMT) has been proposed as a relevant event during carcinoma progression. Tumor EMT drives the phenotypic conversion of polarized, epithelial tumor cells into highly motile, mesenchymal-like cells, and promotes tumor dissemination and metastasis and the acquisition of tumor resistance to various therapies. In order to investigate the potential...

Multiple myeloma (MM) is a hematologic cancer characterized by clonal proliferation of plasma cells in the bone marrow (BM). The progression, from early stages disease as monoclonal gammopathy undetermined significance (MGUS) and smoldering multiple (SMM) to MM occasionally extramedullary disease, drastically affected tumor microenvironment (TME). Soluble factors direct cell–cell interactions r...

Rhabdomyoma is a benign tumor that comes from skeletal tissue, it classified as cardiac and extracardiac according to the location. Extracardiac rhabdomyomas most frequently originate in head neck at larynx pharynx, being parapharyngeal space an exceptional We present clinical case of 86-year-old man asymptomatic patient with laterocervical mass years evolution, has increased its size progressi...

Epithelial-mesenchymal transition (EMT) is implicated in converting stationary epithelial tumor cells into motile mesenchymal cells during metastasis. However, the involvement of EMT in metastasis is still controversial, due to the lack of a mesenchymal phenotype in human carcinoma metastases. Using a spontaneous squamous cell carcinoma mouse model, we show that activation of the EMT-inducing t...

Gastrointestinal (GI) mesenchymal tumors other than gastrointestinal stromal tumor (GIST) are rare neoplasms, but they often enter the differential diagnosis of more common GI lesions. Some of these mesenchymal tumors in the GI tract have well understood molecular pathologic aspects, including desmoid tumors, inflammatory myofibroblastic tumor (IMT), clear cell sarcoma (CCS), inflammatory fibro...