What are Ganglions caused by?
What causes ganglion cysts? A ganglion cyst starts when the fluid leaks out of a joint or tendon tunnel and forms a swelling beneath the skin. The cause of the leak is generally unknown, but may be due to trauma or underlying arthritis.
What type of cyst is a ganglion?
Ganglion cysts are noncancerous lumps that most commonly develop along the tendons or joints of your wrists or hands. They also may occur in the ankles and feet. Ganglion cysts are typically round or oval and are filled with a jellylike fluid.
How does Dandy Walker syndrome affect the brain?
Dandy-Walker malformation affects brain development, primarily development of the cerebellum, which is the part of the brain that coordinates movement. In individuals with this condition, various parts of the cerebellum develop abnormally, resulting in malformations that can be observed with medical imaging.
Who is at risk of developing Dandy Walker malformation?
First-degree relatives (such as siblings and children) of people with Dandy-Walker malformation have an increased risk of developing the condition compared with people in the general population. When Dandy-Walker malformation is a feature of a genetic condition, it is inherited in the pattern of that condition.
Are there mutations in genes that cause Dandy Walker?
Researchers have found mutations in a few genes that are thought to cause Dandy-Walker malformation, but these mutations account for only a small number of cases. Dandy-Walker malformation has also been associated with many chromosomal abnormalities.
Can a person with trisomy 18 have Dandy Walker?
This condition can be a feature of some conditions in which there is an extra copy of one chromosome in each cell (trisomy). Dandy-Walker malformation most often occurs in people with trisomy 18 (an extra copy of chromosome 18), but can also occur in people with trisomy 13, trisomy 21, or trisomy 9.