Also found in: Dictionary, Thesaurus.


Not neoplastic.

brain tumor

Neurology A neoplasm affecting the brain which may be 1º–brain or meninges, or 2º–ie metastatic to the brain; malignant gliomas account for 2.5% of all cancer-related deaths; BTs are the 3rd most common CA in ages 15-34; 35,000 BTs occur/yr–US; 1st-degree relatives of children with brain tumors have a 5-fold ↑ in the risk of CNS tumors, leukemia, and other childhood tumors in the affected family Clinical Seizures, vision or hearing loss, hemiparesis, double vision, headache, weird behavior, N&V, memory loss Imaging MRI without and with contrast, CT Management Surgery, gamma knife radiotherapy are often effective; chemotherapy, immunotherapy are not. See Gamma knife.
Brain tumors/masses
Craniopharyngioma, colloid cysts
Meningioma, pituitary adenoma, acoustic neuroma, epidermoid tumors, choroid plexus papilloma
Primary–low grade
Pilocytic astrocytoma, astrocytoma, hemangioblastoma, oligodendroglioma, ganglioglioma
Anaplastic astrocytoma, glioblastoma multiforme, ependymoma, lymphoma, medulloblastoma, primitive neuroectodermal tumor, germ cell tumor, pineal cell tumor, chordoma, choroid plexus carcinoma
Carcinoma, meningeal carcinomatosis
References in periodicals archive ?
It provides consensus guidelines for diagnosing nonneoplastic lesions observed in NTP studies (3) and thus will help resolve discrepancies over how lesions are characterized and described in the NTP's database.
Nonneoplastic lesions of the tracheobronchial wall: Radiologic findings with bronchoscopic correlation.
Also known as multinodular hemangioma, SANT is essentially altered red pulp entrapped by a nonneoplastic stromal proliferation.
Wegener granulomatosis (WG) is an idiopathic, nonneoplastic, aseptic, necrotizing disease characterized by vasculitis and destructive properties.
Dermoids are nonneoplastic, congenital ectodermal inclusion cysts that contain varying amounts of ectoderm derivatives to include apocrine, sweat, and sebaceous cysts as well as hair follicles, squamous epithelium, and possibly teeth.
Using a bullet format and incorporating histological images, he lists the clinical features, histopathologic criteria for diagnosis, differential diagnosis, use of immunohistochemical stains and other ancillary techniques, and relevant molecular tests for nonneoplastic and benign and malignant neoplasms found in the oral cavity, sinonasal tract, salivary glands, oro/hypopharynx/larynx, gnathic bones, ears, and soft tissues.
Third, we would prefer greater transparency when analyzing "cancer datasets" involving grouping of nonneoplastic proliferative lesions with preneoplastic lesions/neoplastic lesions.
Subsequent chapters cover nonneoplastic lesions, solid neoplasms of the exocrine pancreas, cystic neoplasms, solid neoplasms of the endocrine pancreas, primary mesenchymal and other rare neoplasms, and metastatic and secondary neoplasms.
Proposed uses for high magnification used in conjunction with IEE include distinguishing neoplastic and nonneoplastic lesions, assessing depth of invasion in early colorectal carcinoma, and detecting minute tumor residue after endoscopic mucosal resection," the authors said.
To the Editor: Lymphangioleiomyomatosis (LAM) is a rare lung disease of unknown etiology characterized by the nonneoplastic proliferation of smooth muscle-like cells (LAM cells) that can grow to obstruct airways, lymphatics and blood vessels within the lung parenchyma, mediastinum and elsewhere.
Others had nonneoplastic size cysis (>3 but <6 cm) or menopausal size ovaries that could alert the physician to a problem with ovulation, she explained.
Nonneoplastic MCs have round to ovoid nuclei, abundant metachromatic or basophilic granules, and are generally individually dispersed in tissue.