LAMB2 encodes laminin subunit beta-2, a critical basement membrane protein that mediates cell attachment, migration, and tissue organization during development 1. The protein functions as a component of heterotrimeric laminin isoforms and interacts with integrin receptors to promote cell adhesion and extracellular matrix organization 2. In the glomerular basement membrane, LAMB2 is essential for kidney filtration, with its N-terminal LN domain crucial for intermolecular interactions 1. Pathogenic LAMB2 variants cause autosomal recessive Pierson syndrome, characterized by congenital nephrotic syndrome with ocular and neurologic abnormalities 12. LAMB2 mutations represent one of five major genetic causes of congenital nephrotic syndrome, with truncating mutations typically producing severe phenotypes, while missense mutations in the LN domain may represent hypomorphic alleles associated with later disease onset and milder presentation 13. Additionally, LAMB2 is implicated in congenital myasthenic syndromes affecting neuromuscular junction development 4. Recent evidence suggests LAMB2-integrin interactions participate in tumor microenvironment remodeling during cancer progression 5. Genotype-phenotype correlations remain incomplete, suggesting additional genetic or environmental modifiers influence clinical expression.