fifth disease, the body stops producing red blood
cells for a short time. This usually does not cause a problem for an otherwise
normally healthy child or adult. But it can become a serious threat for
people who have blood disorders, such as
sickle cell disease and
thalassemia. These people can develop transient
aplastic crisis, a rapid worsening of existing
anemia that usually lasts 7 to 10 days. People who
have transient aplastic anemia can become very sick. Symptoms include fever,
lethargy, rapid heart rate, and rapid breathing.
People who have
impaired immune systems who become infected with fifth
disease may develop a chronic parvovirus B19 infection that can lead to severe
The brain is made of different kinds of cells. Childhood brain tumors are grouped and treated based on the type of cell the cancer formed in and where the tumor began growing in the CNS. Some types of tumors are divided into subtypes based on how the tumor looks under a microscope. See Table 1 for a list of tumor types and staging and treatment information for newly diagnosed and recurrent childhood brain tumors.
Table 1. The Staging and Treatment of Newly Diagnosed or Recurrent Tumors According...