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BI-RADS Lexicon

Breast Imaging Reporting And Database System Masses: seen on 2 views (if on one view only - density) Shape: Round, Oval, Lobular, Irregular Margin: Circumscribed, Microlobulated, Obscured, Indistinct (Ill-defined), Spiculated Density: High Density, Equal Density (Isodense), Low density but no fat containing, Fat containing radiolucent (Oil cyst, Lipoma, Galactocele, Hamartoma) Calcifications: Typically Benign: Skin calcs, Vascular calcs, Coarse or Popcorn-like (Involuting Fbroadenoma), Large Rod-like calcs, Round calcs, Punctate calcs, Lucent-Centered calcs, Rim or Eggshell calcs (fat necrosis), Milk of Calcium calcs (teacups, 90 sec compression prior exposure), Suture calcs, Dystrophic calcs (irradiated breast or following trauma) Higher probability Malignancy: Amorphous or Indistinct Calcs: small hazy roundish calcs - bx Coarse heterogeneous Calcifications: Fine Pleomorphic Calcifications: many shapes, <0.5mm Fine Linear Branching Calcifications: calcs filling the duct, DCIS Distribution: Diffuse/Scattered: if no other worrisome characteristics, usually benign Regional: not usually worrisome unless other worrisome characteristics (pleomorphic calcs) Grouped: calcs in 2cm, may be worrisome Linear: worrisome, DCIS Segmental: worrisome, suggestive of multifocal DCIS confined to a single lobe of the breast Architectural Distortion: change from the normal crisscrossing arcs without vissible mass Intrammary Lymph node Focal asymmetry Global asymmetry PNL: Posterior Nipple Line