Axilla Ultrasound
An underarm scan assesses a localized lump, lymph nodes, and surrounding soft tissue.
What the exam evaluates
- Underarm lymph nodes
- Palpable lumps or masses
- Localized swelling or tenderness
Common reasons for this exam
- A palpable underarm lump or localized swelling.
- Clinician-directed follow-up of a lymph node.
Approximate duration
Most exams take about 15 to 30 minutes once approved. You can typically return to normal activities immediately afterward.
What to expect
The sonographer applies gel and moves a handheld probe over your skin. You may be asked to change position or briefly hold your breath. Pressure over a tender area can be uncomfortable; tell the sonographer so they can adjust. Ultrasound uses sound waves, with no ionizing radiation. You can usually resume normal activities afterward.
How to prepare
Follow your appointment instructions
- This exam must be scheduled at least three days in advance so the appropriate sonographer can be available.
- No fasting is usually needed for this exam.
- Wear clothing that gives easy access to the area being scanned. Bring earlier imaging reports and your order, if available.
- Continue prescribed medicines unless your clinician gives different instructions. Tell the team about pain, limited mobility, or positioning needs.
Understanding your results
- An underarm scan does not replace dedicated breast imaging when indicated.
- An indeterminate or suspicious lump may require further imaging or a biopsy; ultrasound alone cannot rule out cancer.
What happens next?
A radiologist interprets the images. Review the report and any recommended next steps with your clinician. The sonographer may not be able to give a diagnosis during the appointment. Persistent symptoms still need follow-up even when the scan is normal.
Sources & further reading
This patient summary draws on published clinical literature and professional guidance. Patient resources are identified separately below. Preparation also depends on your specific order and the collecting laboratory or imaging team.
- Ultrasonography of Superficial Soft-Tissue Masses: SRU Consensus Conference Statement
Radiology, 2022
Content updated October 11, 2026. General education; individual advice comes from your care team.
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A note on what we are. Palmetto Preventive provides non-emergency outpatient diagnostic imaging and laboratory services. We are not an emergency department, urgent care center, hospital, or a substitute for emergency evaluation, and we are not a longitudinal primary-care practice. If you are experiencing severe or rapidly worsening symptoms, seek immediate medical care or call 911.
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