DSC3 (desmocollin 3) is a transmembrane cadherin protein that serves as a critical component of desmosomes, specialized cell-cell junctions essential for intercellular adhesion 1. The protein plays a fundamental role in maintaining epidermal integrity and dermal barrier function, with homozygous nonsense mutations causing hereditary hypotrichosis and recurrent skin vesicles characterized by sparse, fragile hair and fluid-filled vesicles 2. Mechanistically, DSC3 functions as a calcium-dependent adhesion molecule, with autoantibodies in pemphigus recognizing calcium-dependent epitopes primarily in the extracellular domain 2, leading to keratinocyte dissociation and blister formation 34. Beyond dermatological conditions, DSC3 has significant clinical relevance in cancer, where promoter hypermethylation leads to downregulation in colorectal and prostate cancers 56. Loss of DSC3 expression correlates with poor prognosis and increased risk of biochemical recurrence in prostate cancer, potentially through epithelial-mesenchymal transition mechanisms 6. Additionally, DSC3 serves as a co-factor for Epstein-Barr virus infection of epithelial cells, working alongside DSC2 to facilitate viral entry 7. The protein's expression is regulated by p53, highlighting its role in cellular homeostasis and tumor suppression pathways 5.