An epidermal inclusion cyst — also known as an epidermoid cyst, infundibular cyst, keratin cyst, or inclusion cyst — is the most common type of cutaneous cyst. Patients present with a nodule that is ...

Cysts are small sacs filled with fluid, air or skin cells that can pop up just about anywhere. While most of these bumps are perfectly harmless and stay quiet, they can occasionally become inflamed, ...