Teratocarcinosarcoma is a rare, morphologically heterogeneous and highly malignant neoplasm. It is characterized by the presence of benign and malignant epithelial, mesenchymal and neural components. The carcinoma may be either squamous or adenocarcinoma and the mesenchymal component may manifest spindle, smooth, skeletal muscle, cartilage and bone features. Because of their infrequency, these ...

Departments of *Radiation Oncology, yOtolaryngology–Head and Neck Surgery, and zPathology, University of California, San Francisco Comprehensive Cancer Center, San Francisco, CA; xDepartment of Radiation Oncology, Memorial Sloan-Kettering Cancer Center, New York, NY; kDepartment of Radiation Oncology, The University of Texas M. D. Anderson Cancer Center, Houston, TX; and {Department of Otolaryn...

undifferentiated nasopharyngeal corcinoma is frequently misdiagnosed as large cell malignant lymphoma. the aim of this study is to evaluate the diagnostic role of immunohistochemistry and electron microscopy in this tumor. 81 cases of nasopharyngeal carcinoma were studied. patients ranged from 9-90 years in age (mean: 48.5 years). the age incidence curve was bimodal with two peaks in 2-3 and 5-...

Sinonasal undifferentiated carcinoma (SNUC) is a rare malignancy of the upper airways and anterior skull base that carries a poor prognosis. The tumor is known to be invasive into the surrounding structures of the skull base and brain. To date, there is only one existing case report documenting drop metastasis to the intradural extramedullary spinal cord. To the best of our knowledge, we presen...