<P> Both of the above types of cyst contain keratin , not sebum , and neither originates from sebaceous glands . Epidermoid cysts originate in the epidermis and pilar cysts originate from hair follicles . Therefore , technically speaking they are not sebaceous cysts . `` True '' sebaceous cysts , cysts which originate from sebaceous glands and which contain sebum , are relatively rare and are known as steatocystoma simplex or , if multiple , as steatocystoma multiplex . </P>
<P> Both of the above types of cyst contain keratin , not sebum , and neither originates from sebaceous glands . Epidermoid cysts originate in the epidermis and pilar cysts originate from hair follicles . Therefore , technically speaking they are not sebaceous cysts . `` True '' sebaceous cysts , cysts which originate from sebaceous glands and which contain sebum , are relatively rare and are known as steatocystoma simplex or , if multiple , as steatocystoma multiplex . </P>
what is the stuff in a sebaceous cyst
what is the stuff in a sebaceous cyst
keratin
keratin