Cysts are pathological cavities that may or may not be lined by the epithelium and are filled with either gas, fluid or semi-solid materials. Once formed, a cyst could go away on its own or may have to be removed through surgery. In this book, the authors present current research in the study of the causes, diagnosis and treatment options of cysts. Topics discussed include recent advances in the diagnostic imaging of cysts and pseudocysts in the oral and maxillofacial region; inflammatory odontogenic cysts; cystic renal pathology; non-parasitic benign liver cysts; and the malignant potential of epidermal and verrucous cutaneous cysts.