![](http://54.180.189.199/wp-content/uploads/2022/10/image-114-784x1024.png)
![](http://54.180.189.199/wp-content/uploads/2022/10/image-79-1024x283.png)
- Homogenous background echotexture – fibroglandular
- Homogenous background echotexture – fat
- Heterogenous background echotexture
![](http://54.180.189.199/wp-content/uploads/2022/10/image-68-1024x288.png)
- 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
![](http://54.180.189.199/wp-content/uploads/2022/10/image-72-1024x927.png)
- 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
![](http://54.180.189.199/wp-content/uploads/2022/10/image-70-1024x387.png)
- Parallel : long axis of the mass parallels the skin line
- Not parallel : the AP dimension is greater than the transverse dimension
![](http://54.180.189.199/wp-content/uploads/2022/10/image-73-1024x524.png)
- Hyperechoic
- Isoechoic
- Hypoechioc
- Anechoic
- Complex solid and cystic (C4) : contains both anechoic (cystic or fluid) and echogenic (solid) components
- Heterogenous
![](http://54.180.189.199/wp-content/uploads/2022/10/image-74-1024x437.png)
- Enhancement : cyst, homogeneous solid lesions (including high-grade carcinomas)
- Shadowing : Shadowing is associated with fibrosis, with or without an underlying carcinoma.
- Combined
![](http://54.180.189.199/wp-content/uploads/2022/10/image-75-1024x262.png)
![](http://54.180.189.199/wp-content/uploads/2022/10/image-76-1024x588.png)
- Architectural distortion
- Duct changes
- Skin changes : thickening (>2mm), retraction
- Edema
- Elasticity
- Vascularity
![](http://54.180.189.199/wp-content/uploads/2022/10/image-77-1024x516.png)
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