CDH7 (cadherin 7) encodes a calcium-dependent cell adhesion glycoprotein that functions primarily in cell-cell adhesion and morphogenesis 1. The protein is part of the cadherin superfamily, which mediates homophilic cell-cell adhesion and contributes to cell sorting during development 2. CDH7 is localized on chromosome 18-q23 and shows distinct expression patterns compared to other closely related cadherins 2. The gene plays important roles in neural development, including neural circuit formation and synaptic function 3. CDH7 has significant disease relevance, particularly in neuropsychiatric disorders. Common variants in CDH7 are associated with major depressive disorder in Han Chinese populations, with specific SNPs showing protective or risk effects 1. The gene is also implicated in bipolar disorder and other psychiatric conditions through genome-wide association studies 34. Additionally, CDH7 variants have been associated with central serous chorioretinopathy, potentially through effects on cortisol regulation 5. In cancer contexts, CDH7 expression is associated with poor prognosis in gastric cancer and may be regulated by microRNAs in rectal cancer treatment response 67. The gene's involvement in cell adhesion pathways and nervous system development makes it clinically significant for understanding psychiatric and ocular diseases.