SIMPLE CYSTS

• A circumscribed, round or oval, fluid-filled mass with an imperceptible wall
• Signal characteristics are usually bright on T2W images, although benign cysts may have variable signal characteristics.
• Cysts are characteristically benign if no enhancing solid elements are detected.
• Wall of a cyst can enhance; this is also a benign finding if thin and uniform.

Related Radiology Article: Hines N, Slanetz PJ, Eisenberg RL. Cystic masses of the breast. American Journal of Roentgenology. 2010 Feb;194(2):W122-33.