Using stem cell-labeling techniques and the clonogenicity assay,most of the hair follicle stem cells are found at the bulge region,a portion in the outer root sheath of the hair follicle,which is at the insertion site of the arrector pili muscle.

The clinical experience of carinal resection for malignant tumor in 9 patients;

Study on expression of uPA/uPAR in hair follicle bulge of human embryo;

Expression and significance of β-catenin and cox-2 in bulge-originated cells from rat hair follicles;

The bulge is a part of the outer root sheath, which was contiguous with the epidermis.

Isolation, cultivation and identification of human fetal follicular bulge cells in vitro;