Items tagged “neoplasm”

10 results found

Butterfly glioma

Butterfly gliomas are a high grade astrocytoma, usually a glioblastoma (WHO grade IV), which crosses 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.  Most freq...

Primary CNS lymphoma

Primary CNS lymphomas (PCNSL) are relatively uncommon tumors, accounting for 2.5% of all brain tumors. By definition, there is no co-existing systemic disease at the time of diagnosis, distinguishing it from CNS involvement from systemic lymphoma (secondary CNS lymphoma). On imaging, PCNSL char...

Dysembryoplastic neuroepithelial tumor

Dysembryoplastic neuroepithelial tumors (DNET) are benign (WHO Grade I) slow growing glioneuronal tumors arising from either cortical or deep grey matter. The vast majority are centered in cortical grey matter, arise from secondary germinal layers, and are frequently associated with cortical dys...


Ependymomas represent a relatively broad group of glial tumors most often arising from the lining 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 occurring...

Gastrointestinal tract lipomas

Gastrointestinal tract lipomas are not uncommon and can be found anywhere along the entire length of the gastrointestinal tract.  Epidemiology Gastrointestinal tract lipomas are most frequently encountered between the ages of 50 and 70 years 3. Clinical presentation The majority of lipomas a...


Meningioangiomatosis is a rare meningovascular hamartomatous plaque like or mass like cortical lesions extending to the overlying lepomeninges (crosses the boundary between intra and extra axial lesions). Given its frequent cortical location, often patients present with seizures. It can be spora...


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...

Sonographic features of malignant lymph nodes

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

Peritoneal mesothelioma

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 subtypes (also discussed separat...

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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