In conclusion, our study identifies epidermal basal cells in the IFE and INF with stem cell capacity marked by Troy. In contrast to other IFE-associated stem cell markers, such as Axin2 and Lgr6 (Füllgrabe et al., 2015; Lim et al., 2013), Troy is confined to the basal layer of the cornifying compartment and not robustly expressed in the SG or lower HF in telogen skin. The gene discussed is LGR6; the disease is hydrops fetalis.