Final answer:
A pilar cyst is a benign growth originating from hair follicle cells on the scalp, filled with keratin, and often inherited. It differs from ovarian cysts, which are fluid-filled sacs within the ovary, and are usually harmless. Polycystic ovary syndrome (PCOS) involves multiple cysts and a range of other symptoms, resulting from disrupted ovulation.
Step-by-step explanation:
What is a Pilar Cyst?
A pilar cyst, also known as a trichilemmal cyst, is not directly related to ovarian cysts or PCOS. Instead, it's a type of cyst that forms on the scalp. Pilar cysts are benign growths that originate from hair follicle cells and are typically filled with keratin, which is a protein found in hair and nails. These cysts are smooth, mobile under the skin, and often painless. The exact cause of pilar cysts is unknown, but they are sometimes inherited in a dominant fashion. Although treatment is not necessary for a pilar cyst, if it becomes painful or infected, medical intervention may be required.
Conversely, an ovarian cyst is a fluid-filled sac within the ovary often resulting from the normal ovulation process. Most ovarian cysts are harmless and resolve on their own without the need for treatment. Some cysts, however, can grow large and cause pain, requiring medical intervention including potential surgery. Furthermore, polycystic ovary syndrome (PCOS) is characterized by multiple cysts in the ovaries along with a range of other symptoms including irregular menstrual cycles, hirsutism, and insulin resistance. These cysts result from a failure in the normal ovulation process, where follicles in the ovaries do not mature and release eggs as they should.