Skin-Associated Cartilage Is a Distinct Type of Lipid-Filled Tissue

The study by Ramos et al. (2025) identifies a new type of tissue in mice and other mammals called lipocartilage, found in ear, laryngeal, and nasal cartilages. This tissue is characterized by lipochondrocytes with stable lipid vacuoles, unlike adipocytes. Lipocartilage plays a role in skin biology by releasing signaling factors that inhibit hair growth and offers potential insights into cartilage regeneration. This finding challenges the previous classification of ear cartilage as elastic cartilage and suggests that dermatologists should consider the unique properties of lipocartilage in their research.