Items tagged “neoplasm”

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 ...

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 tumour after gliomas 17. By definition, there is no co-existing systemic disease at the time of diagnosis, distinguishing it from CNS in...

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

Ependymomas represent a relatively broad group of glial tumours 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 paediatric brain tumours and up to 33% of brain tumours oc...

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:  oesophageal lipoma gastric lipoma Epidemiology Gastrointestinal tract lipomas are most frequent...

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 ...

Meningiomas are extra-axial tumours and represent the most common tumour 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 pres...

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

Malignant peritoneal mesothelioma is an uncommon primary tumour 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 (a...