Items tagged “neoplasm”

10 results found
Article

Butterfly glioma

Butterfly gliomas are high-grade astrocytomas, IDH-mutant or glioblastomas, IDH-wildtype that cross the midline via the corpus callosum. Other white matter commissures are also occasionally involved. The term butterfly refers to the symmetric wing-like extensions across the midline.  Butterfly ...
Article

Lymphomas of the central nervous system

Lymphomas of the central nervous system, the most common of which is primary diffuse large B-cell lymphoma of the CNS, are the second most common primary brain tumor after gliomas 17. By definition, there is no co-existing systemic disease at the time of diagnosis, distinguishing it from CNS inv...
Article

Dysembryoplastic neuroepithelial tumor

Dysembryoplastic neuroepithelial tumors (DNET) are benign (WHO Grade 1) slow growing glioneuronal tumors arising from either cortical or deep grey matter. They are considered part of the heterogeneous group of tumors known as long-term epilepsy-associated tumors (LEATs). The vast majority of DN...
Article

Ependymoma

Ependymomas represent a relatively broad group of glial tumors most often arising from the lining of the ventricles of the brain or the central canal of the spinal cord. They account for ~5% of all neuroepithelial neoplasms, ~10% of all pediatric brain tumors and up to 33% of brain tumors occurr...
Article

Gastrointestinal tract lipomas

Gastrointestinal tract lipomas are not uncommon and can be found anywhere along the entire length of the gastrointestinal tract.  For a more specific discussion, please refer to the articles on:  esophageal lipoma gastric lipoma Epidemiology Gastrointestinal tract lipomas are most fr...
Article

Meningioangiomatosis

Meningioangiomatosis is a rare meningovascular hamartomatous plaque-like or mass-like cortical lesion extending to the overlying leptomeninges (crosses the boundary between intra- and extra-axial lesions). Given its frequent cortical location, often patients present with seizures. Epidemiology ...
Article

Meningioma

Meningiomas are extra-axial tumors and represent the most common tumor of the meninges. They are a non-glial neoplasm that originates from the meningocytes or arachnoid cap cells of the meninges and are located anywhere that meninges are found, and in some places where only rest cells are presum...
Article

Sonographic features of malignant lymph nodes

Lymphadenopathy is quite common, and it can be challenging to differentiate malignant lymphadenopathy from reactive nodal enlargement. Several gray scale and color Doppler features favor malignancy in a lymph node 1,7-9. Gray scale parameters that favor malignancy size: larger - more likely m...
Article

Malignant peritoneal mesothelioma

Malignant peritoneal mesothelioma is an uncommon primary tumor of the peritoneal lining. It shares epidemiological and pathological features with - but is less common than - its pleural counterpart, which is described in detail in the general article on mesothelioma. Other abdominal subtypes (al...
Article

Endobronchial metastases (mnemonic)

Primary neoplasms which may result in endobronchial metastases may be memorized by utilizing the following mnemonic: Kiss My RBC 1  Mnemonic K: Kaposi sarcoma M: melanoma R: renal cell carcinoma B: breast cancer C: colorectal carcinoma, cervical carcinoma, carcinoid See also endobronchi...

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