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Leptomeningeal cancer is a rare complication of cancer in which the disease spreads from the original tumor site to the meninges surrounding the brain and spinal cord. [1] This leads to an inflammatory response, hence the alternative names neoplastic meningitis (NM), malignant meningitis , or carcinomatous meningitis .
Veterinarians have observed meningoencephalitis in animals infected with listeriosis, caused by the pathogenic bacteria L. monocytogenes.Meningitis and encephalitis already present in the brain or spinal cord of an animal may form simultaneously into meningeoencephalitis. [6]
It affects healthy children or young adults who have recently been exposed to bodies of fresh water. [3] Scientists speculate that lower age groups are at a higher risk of contracting the disease because adolescents have a more underdeveloped and porous cribriform plate , through which the amoeba travels to reach the brain.
The epidemiology of cancer is the study of the factors affecting cancer, as a way to infer possible trends and causes. The study of cancer epidemiology uses epidemiological methods to find the cause of cancer and to identify and develop improved treatments. This area of study must contend with problems of lead time bias and length time bias ...
Cancer in adolescents and young adults is cancer which occurs in those between the ages of 15 and 39. [1] This occurs in about 70,000 people a year in the United States—accounting for about 5 percent of cancers. This is about six times the number of cancers diagnosed in children ages 0–14. [1]
Acute lymphoblastic leukemia is the most common type of cancer in children, accounting for ~30% of cases. [2] However, far more adults than children develop lymphoma and leukemia. Germ cell tumor : Cancers derived from pluripotent cells, most often presenting in the testicle or the ovary ( seminoma and dysgerminoma , respectively).
Childhood cancer is cancer in a child. About 80% of childhood cancer cases in high-income countries can be successfully treated via modern medical treatments and optimal patient care. [2] [3] However, only about 10% of children diagnosed with cancer reside in high-income countries where the necessary treatments and care is available.
Head and neck cancer is a general term encompassing multiple cancers that can develop in the head and neck region. These include cancers of the mouth, tongue, gums and lips (oral cancer), voice box (), throat (nasopharyngeal, oropharyngeal, [1] hypopharyngeal), salivary glands, nose and sinuses.