O35.03

Clinical Causes: Genetic factors or chromosomal abnormalities Infections during pregnancy, such as cytomegalovirus or rubella Environmental exposures to harmful substances like alcohol, drugs, or toxins Maternal conditions like diabetes or autoimmune diseases Placental abnormalities or issues with blood flow Unknown factors, which are common in many pregnancy cases

Key Symptoms: No outward signs in the mother; fetal anomalies often detected via ultrasound Presence of choroid plexus cysts identified during fetal ultrasounds Possible associated abnormalities in brain structures if the malformation or damage is significant Fetal ventriculomegaly (enlargement of brain ventricles) Reduced fetal movements depending on the severity of damage Potential signs of developmental delays or neurological issues as the child grows, though these are not detectable during pregnancy

Diagnosis Path: Diagnosis typically involves detailed ultrasound examinations during pregnancy, which can reveal structural brain abnormalities and cysts in the choroid plexus. Fetal MRI might be used for further clarification. Genetic testing, such as amniocentesis, can be offered to identify chromosomal issues linked to CNS malformations. Close collaboration among obstetricians, radiologists, and genetic counselors is essential for comprehensive assessment and counseling about possible outcomes.

Treatment Protocols: Since many CNS anomalies and cysts are diagnosed prenatally, management focuses on monitoring and preparing for potential complications. This may include regular ultrasounds to track the development and any progression of abnormalities. In some cases, a multidisciplinary team might plan for interventions after birth, including specialized neurological or surgical care. Prenatal counseling helps expectant parents understand their options and prepare for possible outcomes, including the need for ongoing medical support or therapies following delivery.