Leukoencephalopathy with calcifications and cysts (Labrune syndrome): A Patient Guide

Leukoencephalopathy with calcifications and cysts (LCC), also known as Labrune syndrome, is a rare genetic condition that primarily affects the small blood vessels and structural integrity of the brain. It is characterized by a specific “imaging triad” that doctors look for on brain scans: abnormal changes in the brain’s white matter (leukoencephalopathy), the buildup of mineral deposits (calcifications), and the formation of fluid-filled sacs (cysts) ^[1]. These three features typically develop because of a mutation in the SNORD118 gene, which disrupts the delicate machinery cells use to build proteins ^[2]. While the exact mechanism is still being studied, researchers believe this cellular stress ultimately damages small blood vessel walls in the brain.

The condition is known for being highly variable, meaning it can look very different from one person to the next. Symptoms can begin at any age, from infancy to late adulthood, and the “tempo” of the disease can range from very slow progression over decades to more rapid changes when a cyst begins to grow ^[3]. While the condition is progressive, the amount of change seen on a scan does not always predict how a person feels; some individuals remain stable for many years with minimal impact on their daily lives, while others may manage challenges with coordination, balance, or seizures ^[4].

Because LCC shares many imaging features with a multi-system condition called Coats plus syndrome, receiving an accurate diagnosis is a critical first step. Unlike Coats plus, which frequently involves the eyes, bones, and digestive system, LCC is usually isolated to the brain ^[5]. Distinguishing between the two through genetic testing ensures that your medical team can focus specifically on neurological health. While a confirmed molecular diagnosis of LCC means multisystem features are not typical, your treating team will decide whether any eye, blood, bone, or gastrointestinal evaluation is appropriate based on your specific clinical presentation and whether testing remains inconclusive ^[6].

Management of LCC is centered on proactive, individualized long-term surveillance rather than a single curative treatment. This involves regular brain imaging to monitor the status of cysts, which can sometimes grow large enough to cause pressure on surrounding tissue. When a cyst becomes symptomatic or causes hydrocephalus, neurosurgical procedures—such as draining the fluid or placing a small reservoir—can effectively relieve acute pressure ^[7]. By combining active surveillance with medications to manage symptoms like seizures or muscle stiffness, you and your care team can work to preserve your quality of life and navigate the complexities of this rare diagnosis with a clear, informed plan ^[8].