Cutaneous Cysts (Epidermal Inclusion Cyst [Epidermoid Cyst]; Milia; Pilar Cyst; Trichilemmal Cyst [Wen]) By Denise M Aaron, MD, Dartmouth Geisel School of Medicine Reviewed / Revised Jan 2022 | Modified Sep 2022 View Patient Education Treatment Topic Resources Epidermal Inclusion Cyst Milia Epidermal inclusion cysts are the most common cutaneous cysts.