Question: Is Hydrocephalus due to congenital stenosis of aqueduct of sylvius inherited ?
Answer: Is hydrocephalus due to congenital stenosis of aqueduct of sylvius inherited? Hydrocephalus due to congenital stenosis of aqueduct of sylvius is inherited in an X-linked recessive manner. A condition is X-linked if the responsible gene is located on the X chromosome. The X chromosome is one of the two sex chromosomes (the other sex chromosome is the Y chromosome). Females have two X chromosomes in each cell and males have an X chromosome and a Y chromosome in each cell. Although females have two X chromosomes, one of the X chromosomes in each cell is "turned off" and all of the genes on that chromosome are inactivated. Females who have a change (mutation) in a gene on one of their X chromosomes are called carriers of the related condition. Carrier females usually do not have symptoms of the condition because the X chromosome with the mutated gene is often turned off and they have another X chromosome with a working copy of the gene. Sometimes, the X chromosome with the working copy of the gene is turned off, which may cause symptoms of the condition. However, females with symptoms are usually much more mildly affected than males. A male has only one X chromosome, so if he inherits a mutation on the X chromosome, he will have signs and symptoms (be affected). Males with an X-linked recessive condition always pass the mutated gene to all of their daughters, who will be carriers. A male cannot pass an X-linked gene to his sons because males always pass their Y chromosome to male offspring. Female carriers of an X-linked recessive condition have a 25% chance with each pregnancy to have a carrier daughter like themselves, a 25% chance to have a non-carrier daughter, a 25% chance to have an affected son, and a 25% chance to have an unaffected son. This also means that each daughter of a carrier mother has a 50% chance of being a carrier, and each son has a 50% chance of having the condition.
Source: GARD

Question: How to diagnose Hydrocephalus due to congenital stenosis of aqueduct of sylvius ?
Answer: How is hydrocephalus due to congenital stenosis of aqueduct of sylvius diagnosed? A diagnosis of hydrocephalus due to congenital stenosis of aqueduct of sylvius is typically suspected based on the presence of characteristic signs and symptoms on physical examination and/or brain imaging (i.e. CT scan, MRI scan). Identification of a change (mutation) in the L1CAM gene can be used to confirm the diagnosis.
Source: GARD