Indeed, it has been reported that the PGP9.5-positive nerve fiber density in the basal layer of the endometrium or myometrium is significantly increased in women with adenomyosis complaining pain, and that neurofilament (NF)-positive, but not PGP9.5-positive, nerve fibers are found in the basal layer of the endometrium and myometrium in women with adenomyosis [41]. Here, NFASC is linked to adenomyosis.