- Homogenous background echotexture – fibroglandular
- Homogenous background echotexture – fat
- Heterogenous background echotexture
- Oval : mass that is elliptical and egg-shaped (may include 2 or 3 undulations, i.e., gently lobulated or macrolobulated)
- Round : spherical, ball-shaped, circular or globular (AP diameter equal to its transverse diameter/ must be circular in perpendicular projections)
- Irregular : neither round nor oval
- Circumscribed : well defined with an abrupt transition between the lesion and surrounding tissue
- Angular : Some or all of the margin has sharp corners, often forming acute angles, but the significant feature is that the margin of the mass is not circumscribed
- Indistinct : No clear demarcation of the entire margin or any portion of the margin from the surrounding tissue, includes echogenic rim
- Microlobulated : short cycle undulations
- Spiculated : sharp lines projecting from the mass
- Parallel : long axis of the mass parallels the skin line
- Not parallel : the AP dimension is greater than the transverse dimension
- Hyperechoic
- Isoechoic
- Hypoechioc
- Anechoic
- Complex solid and cystic (C4) : contains both anechoic (cystic or fluid) and echogenic (solid) components
- Heterogenous
- Enhancement : cyst, homogeneous solid lesions (including high-grade carcinomas)
- Shadowing : Shadowing is associated with fibrosis, with or without an underlying carcinoma.
- Combined
- Architectural distortion
- Duct changes
- Skin changes : thickening (>2mm), retraction
- Edema
- Elasticity
- Vascularity
9) Special cases
- Simple cyst
- Clustered microcysts
- Complicated cyst
- Mass in or on skin
- Foreign body (including implants)
- Intramammary lymph node
- AVM
- Mondor disease
- Postsurgical fluid colleciotn
- Fat necrosis
