Breast Ultrasound

Question 1

What is the arrow referencing?

Answer 1

The arrow is referencing a** rib**.

Ribs are common palpable structures potentially confused for a breast mass. Note the structures anterior to the rib: pectoralis muscles immediately anterior then the posterior margin of breast tissue.

Question 2

Approximately 75% of lymph drains from the breast tissues into the axillary lymph node chain. Where does the other 25% potentially drain?

Answer 2

The other 25% of lymph drainage is to various outer lymph node chains surrounding the breast. These include:

• Internal Mammary nodes
• Intercostal nodes
• Supraclavicular nodes
• Flow to the opposite breast
• Flow to the diaphragm

Question 3

There are 3 classic densities identified on mammography. Name the densities.

Answer 3

The 3 classic densities identified on mammography include:

• Fat density
• Water density
• Calcium density

Question 4

A phyllodes tumor arises from what type of tissue of the breast?

Answer 4

A Phyllodes tumor, previously known as cystosarcoma phyllodes, is a rare lesion arising from the** stroma or connective tissue** of the breast. Therefore, it is not associated with the glandular portion of the breast or TDLU.

Question 5

Speed error is a common artifact seen while imaging breast implant patients. Is speed error associated with saline or silicone gel implants?

Answer 5

Speed error is not a problem with saline implants. It is only seen with silicone gel implants.