What it is (overview)

An Abdomen Axilla Ultrasound is a non-invasive diagnostic imaging exam that uses high-frequency sound waves (ultrasound) to create real-time pictures of structures inside the abdomen (belly) and the axilla (armpit area). Unlike X-rays or CT scans, ultrasound does not use ionizing radiation. A technologist places a small handheld device (transducer) on your skin with gel; the device sends sound waves into the body and receives echoes back to form images.

What it evaluates: In the abdomen, an abdominal ultrasound may assess the liver, gallbladder, bile ducts, pancreas (often partially), spleen, kidneys, bladder (when included), major blood vessels, and general abdominal tissues for swelling, fluid, stones, or masses. In the axilla, an axillary ultrasound focuses on the soft tissues and especially the lymph nodes under the arm, looking for enlargement, abnormal shape, or other features that may suggest inflammation, infection, or (less commonly) cancer-related changes.

What results can mean (in plain language): A “normal” result generally means the organs and axillary lymph nodes look typical in size and appearance, with no clear signs of a mass, cyst, abscess, or fluid collection. If something is “abnormal,” the report may describe findings such as a cyst (a fluid-filled sac that is often benign), a solid mass (which may require additional imaging or biopsy to determine the cause), swollen lymph nodes (commonly reactive from infection or inflammation), stones (such as gallstones or kidney stones), or fluid in the abdomen. Ultrasound findings are interpreted alongside your symptoms (for example, abdominal pain or a lump in the armpit) and other tests to guide next steps.

When & why it's usually done

Your clinician may order an Abdomen Axilla Ultrasound when symptoms, exam findings, or prior imaging suggest a problem in the belly organs and/or the underarm region. It is commonly used because it is quick, widely available, and non-invasive.

Abdominal ultrasound is often done for:

• Ongoing or sudden abdominal pain, especially in the upper right abdomen (possible gallbladder or liver issues)
• Nausea, vomiting, bloating, or unexplained digestive symptoms
• Abnormal liver or kidney blood tests, or suspected fatty liver disease
• Yellowing of the skin/eyes (jaundice) to look for bile duct blockage
• Suspected gallstones, kidney stones, or urinary blockage
• Fever with concern for an abdominal infection or abscess
• A felt lump, swelling, or concern for tumors or cysts
• Follow-up of known findings (such as liver cysts, kidney cysts, or prior masses)

Axillary ultrasound is often done for:

• A new lump, swelling, tenderness, or other axilla abnormalities
• Enlarged or painful lymph nodes after infection, skin irritation, or vaccination, when persistence or size raises concern
• Evaluation of suspected abscess, hidradenitis, or other soft-tissue infection
• Breast-related evaluation (the underarm lymph nodes can reflect breast conditions); it may be used alongside mammogram or breast ultrasound when clinically indicated
• Monitoring known lymph node changes over time or assessing response to treatment

Depending on your situation, your clinician may use the ultrasound results to decide whether no further testing is needed, whether short-term follow-up imaging is appropriate, or whether additional evaluation (such as CT, MRI, or a needle biopsy) is recommended.

Common diseases related to it

• Gallstones (cholelithiasis) and gallbladder inflammation (cholecystitis)
• Fatty liver disease (hepatic steatosis) and enlarged liver (hepatomegaly)
• Liver cysts, benign liver lesions (such as hemangioma), and suspected liver tumors
• Bile duct dilation or blockage (cholestasis), including possible choledocholithiasis
• Kidney stones (nephrolithiasis), hydronephrosis, and urinary tract obstruction
• Kidney cysts and suspected renal masses
• Ascites (fluid in the abdomen) and abdominal fluid collections
• Abdominal abscess or other intra-abdominal infection/inflammation
• Reactive or enlarged axillary lymph nodes from infection or inflammation (lymphadenopathy)
• Skin/soft tissue infections and abscesses in the axilla
• Hidradenitis suppurativa (chronic, painful underarm nodules/abscesses)
• Suspicious axillary lymph node changes related to breast disease or lymphoma (when clinically suspected)

Health goals where it may help

• Finding the cause of persistent or recurrent abdominal pain without invasive testing
• Monitoring liver health (for example, fatty liver changes or follow-up of liver cysts/lesions)
• Evaluating gallbladder and bile duct health (such as checking for gallstones or blockage)
• Supporting kidney and urinary tract health by checking for stones or obstruction
• Assessing and monitoring lymph nodes in the axilla for swelling, inflammation, or other abnormalities
• Tracking response to treatment for infections or abscesses in the abdomen or armpit
• Follow-up imaging for known cysts, benign masses, or previously identified findings
• Providing a radiation-free imaging option for appropriate patients needing repeat ultrasound examinations