A pilar cyst-also known as a trichilemmal cyst, an isthmus-catagen cyst, or a "wen"-forms around a hair follicle, which is why they're typically found on the scalp, according to Medical News Today .

Dr. Pimple Popper opens up a cyst on a patients back, removes the sac and releases a shampoo-textured mass of goo. Because of the thick sac wall and other factors, its likely a pilar or epidermoid ...

Television actress Dipika Kakar, who has been battling liver cancer, is set to undergo a minor surgical procedure to remove a ...