3-methylglutaconic aciduria-neonatal cataract-neurologic involvement-congenital neutropenia syndrome

3-methylglutaconic aciduria with neonatal cataract, neurologic involvement, and congenital neutropenia syndrome (sometimes called MGCA type 9 or CLPB-related disorder) is a very rare inherited metabolic disease that affects multiple body systems from birth or early infancy. It is caused by changes (mutations) in the CLPB gene, which provides instructions for making a protein that helps cells manage stress and maintain healthy mitochondria — the energy-producing parts of cells. The condition causes a buildup of a chemical called 3-methylglutaconic acid in the urine, which is a key clue for diagnosis. Children with this syndrome are typically born with cloudy lenses in their eyes (cataracts), have a low number of infection-fighting white blood cells (neutropenia), and show signs of nervous system problems such as movement difficulties, intellectual disability, and sometimes seizures. The combination of these features — eye, blood, and brain involvement — is what makes this syndrome distinct. There is currently no cure. Treatment focuses on managing each symptom: surgery for cataracts, medications or growth factors to boost white blood cell counts and prevent infections, and therapies to support development and neurological health. Early diagnosis is important so that complications like serious infections can be prevented and developmental support can begin as soon as possible.

Bring these to your next appointment

• Q1.What is the current severity of my child's neutropenia, and what infection warning signs should send us to the emergency room immediately?,Should my child start G-CSF treatment, and how will we monitor whether it is working?,How soon should cataract surgery be done, and what vision outcomes can we realistically expect?,What developmental therapies do you recommend starting right away, and how do we access them?,Are there any clinical trials or research studies we should consider enrolling in?,What does the brain MRI show, and how does it relate to my child's developmental outlook?,What is the recurrence risk for future pregnancies, and is genetic counseling available for our family?

Common questions about 3-methylglutaconic aciduria-neonatal cataract-neurologic involvement-congenital neutropenia syndrome