Question: What is (are) Pierson syndrome ?
Answer: Pierson syndrome is a very rare condition that mainly affects the kidneys and eyes. Signs and symptoms include congenital nephrotic syndrome and distinct ocular (eye) abnormalities, including microcoria (small pupils that are not responsive to light). Most affected children have early-onset, chronic renal failure; neurodevelopmental problems; and blindness. Hypotonia (poor muscle tone) and movement disorders have also been reported. Pierson syndrome is caused by changes (mutations) in the LAMB2 gene and is inherited in an autosomal recessive manner. The long-term outlook is poor; affected infants may not survive past the first weeks or months of life.
Source: GARD

Question: Is Pierson syndrome inherited ?
Answer: How is Pierson syndrome inherited? Pierson syndrome is inherited in an autosomal recessive manner. This means that to be affected, a person must have a mutation in both copies of the responsible gene in each cell. Affected people inherit one mutated copy of the gene from each parent, who is referred to as a carrier. Carriers of an autosomal recessive condition typically do not have any signs or symptoms (they are unaffected). When 2 carriers of an autosomal recessive condition have children, each child has a: 25% (1 in 4) chance to be affected 50% (1 in 2) chance to be an unaffected carrier like each parent 25% chance to be unaffected and not be a carrier
Source: GARD

Question: How to diagnose Pierson syndrome ?
Answer: Is genetic testing available for Pierson syndrome? Yes. The Genetic Testing Registry (GTR) provides information about the genetic tests available for Pierson syndrome. The intended audience for the GTR is health care providers and researchers. Patients and consumers with specific questions about a genetic test should contact a health care provider or a genetics professional. According to the GTR, genetic testing for Pierson syndrome may be available for diagnosis in a person suspected of having the condition, carrier testing, and prenatal testing.
Source: GARD