spermatic fascia external spermatic fascia UBERON:0034690 Wikipedia:External_spermatic_fascia Webster's fascia A thin membrane, prolonged downward around the surface of the spermatic cord and testis. It is separated from the dartos tunic by loose areolar tissue. It is derived from the aponeurosis of the abdominal external oblique muscle. intercrural fascia FMA:69248 intercolumnar fascia SCTID:279588002