This value set includes codes based on the following rules:

• Include these codes as defined in http://dicom.nema.org/resources/ontology/DCM

  Code	Display	Definition
  111460	Complex cyst	A fluid-filled sac with greater than normal characteristics.
  111130	Complicated cyst	A fluid filled mass most commonly characterized by homogeneous low-level internal echoes on ultrasound.
  111461	Intracystic lesion	A tumor within a cyst.
  111462	Solid mass	A tumor or lesion.
  111129	Clustered microcysts	A cluster of tiny anechoic foci each smaller than 2-3 mm in diameter with thin (less than 0.5 mm) intervening septations and no discrete solid components.

• Include these codes as defined in http://snomed.info/sct

  Code	Display
  76649007	Sebaceous cyst of skin of breast
  19227008	Foreign body
  59441001	Lymph node
  399294002	Cyst of breast
  22049009	Mammary duct ectasia
  169254007	Ultrasound scan normal