Ultrasound: A type of imaging technique which uses high-frequency sound waves.
Aspirate: The material that is withdrawn with a negative pressure apparatus (syringe).
Breast cyst: A closed cavity or sac in the breast that is lined by epithelium often contains liquid or semi-solid material.
Benign: Stage in which it does not metastasis (spread) and treatment or removal is curative.
Cytology: The study of cells. Implies the use of light or electron microscopic methods for the study of morphology.