Update: What is New in Nail Research with Practical Implications

The presentation discusses recent advancements in nail research, specifically exploring the concepts of onychodermis and onychophyroblasts, the reasons behind the white color of the lunula, and updated insights on the pathogenesis of onychometric. It introduces the term "onichodermis" to describe a specialized dermal layer containing onychofibroblasts, highlighting its significance in nail formation through epithelial-mesenchymal interactions. The findings suggest that Rs PO4, a protein crucial for nail development, is expressed in these fibroblasts. The discussion also addresses the lunula, identifying it as the whitish area at the nail's base, linked to specific histological characteristics within the nail matrix. Recent studies indicate that the lunula's color may stem from the underlying onichodermis. Lastly, the presentation looks into onychometric, a benign tumor previously classified as a fibro-epithelial tumor, presenting evidence that it can arise from onychofibroblasts. Methods like dermatoscopy and single-cell RNA sequencing are utilized to detail the pathology and molecular attributes of onychometric, furthering the understanding of nail-specific tumors. Overall, this research emphasizes the complex interaction between the nail's epithelial and mesenchymal components.