KAZN (kazrin, periplakin interacting protein) is a component of the cornified envelope in keratinocytes involved in cell-cell adhesion dynamics 1. While its primary structural role involves desmosome and adherens junction organization, KAZN has emerged as a multifunctional protein with roles in cell proliferation, differentiation, and apoptosis 2. The gene contains nuclear localization signals and functions in both cytoplasmic and nuclear compartments, though its nuclear function remains poorly characterized. Genetically, KAZN variants associate with multiple reproductive and metabolic disorders. A KAZN locus (PRDM2/KAZN) showed genome-wide significant association with the reproductive subtype of polycystic ovary syndrome (PCOS), characterized by elevated luteinizing hormone and sex hormone-binding globulin 3. The rs10928050 SNP in KAZN is associated with endometriosis-related infertility 45, and KAZN variants replicate in pregnancy complication studies 6. Clinically, KAZN shows disease relevance in cancer and inflammatory conditions. KAZN expression is upregulated in ovarian cancer with prognostic significance, and methylation patterns at CpG site cg17657618 correlate with tumor stage and expression levels, suggesting diagnostic biomarker potential 2. In oral squamous cell carcinoma, KAZN mRNA stability regulation by FUS protein promotes malignant cell behavior 7. KAZN also appears differentially methylated in psoriasis lesions, where expression correlates inversely with methylation status 1. Additionally, KAZN represents a novel PDGFRB fusion partner in myeloid neoplasms 8.