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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 .
DIPG is a terminal illness, since it has a 5-year survival rate of <1%. The median overall survival of children diagnosed with DIPG is approximately 9 months. The 1- and 2-year survival rates are approximately 30% and less than 10%, respectively. These statistics make DIPG one of the most devastating pediatric cancers. [18]
Diffuse leptomeningeal glioneuronal tumor (DLGNT) is a rare, primary CNS tumor, classified as distinct entity in 2016 [1] and described as diffuse oligodendroglial-like leptomeningeal tumor of children in the 2016 classification of CNS neoplasms by the WHO., [2] Typically, it's considered juvenile tumors [3] but can occur in adults, [4] the average age of diagnosis is five years. [3]
Cancer mortality rates are determined by the relationship of a population's health and lifestyle with their healthcare system. In the United States during 2013–2017, the age-adjusted mortality rate for all types of cancer was 189.5/100,000 for males, and 135.7/100,000 for females. [ 1 ]
A retrospective survey from 36 AT/RT cases at St. Jude Children's Hospital from 1984 to 2003 showed that the two-year event-free survival (EFS) for children under three was 11%, and the overall survival (OS) rate was 17%. For children aged 3 years or older, the EFS was 78% and the OS 89%. [6]
The average survival rate for all primary brain cancers in children is 74%. [100] Brain cancers are the most common cancer in children under 19, are result in more death in this group than leukemia. [104] Younger people do less well. [105]
Brain and pancreatic cancers have much lower median survival rates which have not improved as dramatically over the last forty years. [4] Indeed, pancreatic cancer has one of the worst survival rates of all cancers. Small cell lung cancer has a five-year survival rate of 4% according to Cancer Centers of America's Website. [5]
Most are not diagnosed, so definitive data is not available. For symptomatic patients, the prognosis is far worse. In patients without the presence of melanoma, more than 50% die within 3 years of displaying symptoms. While those with malignancy have a mortality rate of 77% with most patients displaying symptoms before the age of 2. [12]