Proximal-type epithelioid sarcoma is an aggressive variant of epithelioid sarcoma most often occurring in soft tissues of the proximal limbs, characterized by polygonal cells, marked nuclear atypia, and varied rhabdoid features. Malignant rhabdoid tumor is an aggressive, well characterized entity typically with rhabdoid morphology and involving the kidney of pediatric patients. Rarely, tumors w...

PURPOSE Ewing sarcoma is a tumor of the bone and soft tissue characterized by diffuse cell membrane expression of CD99 (MIC2). Single-site, surgically resectable disease is associated with an excellent 5-year event-free survival; conversely, patients with distant metastases have a poor prognosis. Noninvasive imaging is the standard approach to identifying sites of metastatic disease. We sought ...

Bone and soft tissue malignancies account for a small portion of brain metastases. In this review, we characterize their incidence, treatments, and prognosis. Most of the data in the literature is based on case reports and small case series. Less than 5% of brain metastases are from bone and soft tissue sarcomas, occurring most commonly in Ewing's sarcoma, malignant fibrous tumors, and osteosar...

Pediatric primary "small round blue cell" tumors in the CNS represent several entities, some more common than others. Ewing sarcoma/peripheral primitive neuroectodermal tumor (ES/pPNET) is rare and must be distinguished from other tumors such as medulloblastoma [1, 2], atypical rhabdoid/teratoid tumor, ependymomal tumors, metastatic sarcomas, hematologic malignancies, and other mimics. Although...

Sarcomas are rare malignant mesenchymal tumors for which there are limited treatment options. One potential molecular target for sarcoma treatment is the Src tyrosine kinase. Dasatinib (BMS-354825), a small-molecule inhibitor of Src kinase activity, is a promising cancer therapeutic agent with p.o. bioavailability. Dasatinib exhibits antitumor effects in cultured human cell lines derived from e...

INTRODUCTION Liposarcoma of the heart and stomach is rare. PRESENTAION OF CASE We report a case of liposarcoma in both organs with dedifferentiated histology. A patient was referred to our hospital with anorexia and weight loss. Upper gastrointestinal tract endoscopy revealed 5-10-mm elevated lesions, and echocardiography and computed tomography showed tumorous lesions in the left atrium. Tum...

2. García Gallego F, Gamallo Amat C, Aguado MG. Registro Nacional de tumores (memoria 1996-1997). Rev Esp Cardiol. 1999;52:13-20. 3. Burke A, Jeudy J Jr, Virmani R. Cardiac tumors: An update. Heart. 2008;94;117-23. 4. Neragi-Miandoab S, Kim J, Vlahakes GJ. Malignant tumors of the heart: a review of tumor type, dianosis and therapy. Clin Oncol (R Coll Radiol). 2007;19:748-56. 5. Constatine G, Sh...

Cardiac rhabdomyomas are the most common primary cardiac tumors in children. These tumors are generally asymptomatic, although they may be associated with neonatal tuberous sclerosis complex. Despite the fact that thyroid dysfunction rarely occurs in tuberous sclerosis, papillary adenomas (hamartomas) of the thyroid gland have been reported in a number of autopsies. Herein, we present the case ...

Ewing/PNET (peripheral neuroepithelioma) tumors are rare aggressive bone sarcomas occurring in young people. Rare-disease clinical trials can require global collaborations and many years. In vivo models that as accurately as possible reflect the clinical disease are helpful in selecting therapeutics with the most promise of positive clinical impact. Human Ewing/PNET sarcoma cell lines developed...

human herpes virus 8 (hhv8) causes kaposi’s sarcoma, a common cancer among aids patients. it is proposed that this virus plays a role in formation of some blood vessel and lymphoma tumors. this study aimed to investigate the frequency of kshv among benign and malignant breast tumors. a total of 24 carcinomas and 24 fibroadenomas paraffin embedded tumoral tissue samples were obtained from the pa...