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Radiology • Head and Neck Ultrasound

Neck & Lymph-Node Ultrasound

Also called: Cervical Ultrasound • Lymph-Node Mapping • Neck-Lump Ultrasound

This focused examination maps a palpable neck lump and accessible cervical lymph nodes. It records the location, size, shape, internal structure and Doppler blood-flow pattern and can identify cysts, inflammation and other superficial neck abnormalities.

Ultrasound can suggest whether a node looks reactive or requires tissue sampling, but it cannot reliably identify every cause. Persistent adult neck lumps, deep disease and indeterminate findings may need ENT examination, contrast CT or MRI and fine-needle aspiration or core biopsy.

Book a Scan How to prepare ↓

Breathing or swallowing difficulty needs immediate assessment

Seek Urgent Help for Airway Symptoms or Rapid Neck Swelling

Go for urgent or emergency assessment if you have:

  • Difficulty breathing, noisy breathing or a harsh high-pitched sound while breathing in.
  • Inability to swallow saliva, drooling, choking or rapidly worsening swallowing difficulty.
  • Rapid swelling of the neck, tongue, lips or floor of the mouth.
  • High fever with severe neck pain, spreading redness, marked drowsiness, confusion or severe weakness.
  • A rapidly enlarging or pulsating neck lump, active bleeding or swelling after neck trauma or a procedure.
  • New facial weakness, arm weakness, speech difficulty, collapse or other acute neurological symptoms.

Do not wait for an outpatient ultrasound. Airway examination, blood tests, nasoendoscopy, urgent CT or immediate treatment may be needed before or instead of routine scanning.

What is Neck and Lymph-Node Ultrasound?

Lymph nodes are small immune-system structures arranged in chains from beneath the chin and jaw to the collarbones and along the major neck vessels. They commonly enlarge in response to infection, inflammation or skin and dental conditions. Less commonly, enlargement is related to tuberculosis, lymphoma or spread from a cancer elsewhere.

A high-frequency probe shows superficial nodes and other accessible neck tissues in real time. Grey-scale ultrasound assesses anatomy and internal architecture; colour and spectral Doppler assess detectable blood flow. The scan is non-invasive and uses no ionising radiation.

A Node's Size Alone Does Not Give the Diagnosis

Reactive nodes can become large and abnormal nodes can be small. Shape, cortex, fatty hilum, necrosis, calcification, vascular pattern, location and change over time are interpreted together with age, symptoms, examination and cancer or infection history.

When Should a Neck Lump Be Reviewed Promptly?

Arrange timely clinical assessment if:

  • An adult neck lump has persisted for about two weeks or longer without a clear resolving infection.
  • The duration is uncertain, the lump is increasing or it returns after apparently resolving.
  • The lump feels firm, fixed, irregular or attached to nearby tissues, or the overlying skin ulcerates.
  • A node is present just above or below the collarbone.
  • There is persistent hoarseness, swallowing pain, a non-healing mouth ulcer or one-sided ear pain.
  • You have unexplained weight loss, drenching night sweats, persistent fever or generalised itching.
  • There is a history of head and neck, thyroid, skin or another cancer.

These features do not prove cancer. They indicate that clinical examination and the correct imaging and tissue pathway should not be delayed or replaced by repeated antibiotics without evidence of bacterial infection.

How is This Different From Other Neck Tests?

Clinical and ENT examination Examines the mouth, tonsils, tongue base, voice box, skin and ears and may include a flexible camera through the nose. Ultrasound cannot see most of these mucosal surfaces.
Neck and lymph-node ultrasound Provides detailed assessment of superficial nodes and accessible lumps, maps a safe needle target and uses no radiation. Bone and air limit deeper views.
Thyroid ultrasound Uses a dedicated protocol for thyroid size, nodules and thyroid-specific risk features, with lymph-node assessment when indicated. A general neck-lump scan does not automatically replace it.
Salivary-gland ultrasound Focuses on parotid and submandibular glands, ducts, stones and gland masses. A lump near the jaw or ear needs the correct salivary rather than generic lymph-node protocol.
Contrast CT or MRI Maps deep neck spaces, the throat, skull base and upper chest more completely and can help find a primary tumour. CT uses radiation; MRI takes longer and suitability depends on the clinical question.
FNA, core biopsy and pathology Fine-needle aspiration collects cells; core biopsy obtains a tissue cylinder. The most appropriate method depends on whether metastasis, lymphoma, tuberculosis or another diagnosis is suspected.

Why Might the Scan Be Requested?

Palpable neck lump To identify whether the lump is a node, cyst, gland, vessel or another superficial structure.
Persistent swollen glands To assess nodes that are enlarging, unexplained or not settling after an illness.
Cancer assessment To map nodes at diagnosis, select a biopsy target or monitor treated head and neck disease.
Possible infection or cyst To assess inflammation, abscess, tuberculous lymphadenitis or a congenital neck lesion.

Other clinical reasons can include:

  • An abnormal lymph node found on thyroid, salivary, carotid, CT, MRI or PET imaging.
  • Follow-up of a node when interval imaging has been recommended.
  • Suspected recurrence after head and neck, thyroid, skin or other cancer treatment.
  • Target selection for ultrasound-guided FNA or core biopsy.
  • Assessment of a suspected thyroglossal duct cyst, branchial anomaly or lymphatic malformation.
  • A superficial collection, lipoma or other soft-tissue lump within the neck.
  • Clarification of a child's persistent, atypical or enlarging neck mass.

Neck pain without a lump usually requires a different pathway. Cervical-spine, muscle, nerve and swallowing disorders are not fully assessed by lymph-node ultrasound.

How Are Neck Lymph Nodes Mapped?

Reports may describe a side and “level” rather than simply saying upper or lower neck. Levels help clinicians compare scans, plan biopsy and understand which head and neck areas normally drain to each nodal group.

Level I Nodes beneath the chin and lower jaw—the submental and submandibular regions.
Level II Upper deep cervical nodes near the angle of the jaw and upper internal jugular vein.
Level III Middle deep cervical nodes alongside the middle internal jugular vein.
Level IV Lower deep cervical nodes extending towards the collarbone.
Level V Nodes in the posterior triangle behind the sternocleidomastoid muscle.
Level VI Central-compartment nodes around the thyroid, voice box and windpipe.

Level numbering describes anatomy, not severity or cancer stage. A report may also use familiar names such as submandibular, jugular-chain, posterior-triangle or supraclavicular nodes.

What Does the Radiologist Assess?

Palpable target and nodal levels The exact lump is matched to the ultrasound finding. Relevant chains on one or both sides are surveyed and abnormal nodes are labelled by side and level.
Long and short-axis measurements Nodes are measured in more than one plane. The short axis often helps comparison, but expected size varies by nodal level and clinical setting.
Shape and border Normal and reactive nodes are often elongated or oval. Roundness, irregular margins or loss of the normal nodal outline can add concern but are not diagnostic alone.
Cortex and fatty hilum The darker outer cortex and brighter central hilum are assessed for thickness, symmetry and preservation. A preserved hilum can be reassuring but does not exclude every lymphoma or metastasis.
Necrosis, cystic change and calcification Fluid-like areas, tissue breakdown and bright calcific foci can occur with metastasis, tuberculosis and other disease. Their pattern and clinical context guide the next step.
Doppler vascularity Central hilar, peripheral, mixed or displaced flow patterns are recorded. Blood flow supports characterisation but cannot replace cytology or histology.
Matting and surrounding tissues The radiologist looks for nodes joined in a cluster, inflammation, oedema or suspected extension beyond the nodal capsule. Ultrasound may not map deep extension completely.
Nearby neck structures Accessible thyroid, salivary tissue, muscles, vessels, skin and cystic lesions may be observed, but a dedicated study is required when one of these is the primary clinical question.

What Can Cause Enlarged Cervical Lymph Nodes?

Reactive lymphadenopathy Colds, tonsillitis, dental infection, ear or scalp inflammation and many viral illnesses activate nearby nodes. They should reduce as the underlying illness settles, although this can take time.
Bacterial lymphadenitis or abscess Nodes can become tender, inflamed and occasionally form pus. Fever, skin redness and rapid progression influence urgency and whether drainage is considered.
Tuberculous lymphadenitis Tuberculosis can cause painless or matted nodes with necrosis and surrounding inflammation. Ultrasound can select a sampling target, while microbiology and pathology establish the diagnosis.
Lymphoma Lymphoma may produce one or several painless nodes and sometimes fever, drenching night sweats or weight loss. Architecture can overlap with reactive nodes, so adequate tissue sampling is important.
Metastatic lymph nodes Cancer cells from the mouth, throat, thyroid, skin or another organ can spread to cervical nodes. Ultrasound assesses the node but cannot always find the original tumour.
Inflammatory and immune conditions Autoimmune disease, granulomatous disorders, medicines and other systemic illnesses can cause local or generalised lymphadenopathy and require clinical and laboratory correlation.

Children and Adults Need Different Context

Children Small mobile neck nodes are common, particularly with frequent viral infections, tonsillitis, dental problems or eczema. Congenital cysts and vascular malformations are also more frequent considerations.
When a child needs review Persistent growth, a hard or fixed node, supraclavicular location, prolonged fever, weight loss, night sweats, bruising, pallor or reduced wellbeing requires timely paediatric assessment.
Adults A persistent neck mass without a clear infectious cause is approached more cautiously. Head and neck cancer can first appear as a painless node, including in adults who have never smoked.
Cystic lateral neck mass in an adult This should not automatically be labelled a harmless branchial cyst. Cystic nodal metastasis—sometimes related to human papillomavirus—must be excluded through the appropriate ENT, imaging and sampling pathway.

How Should I Prepare?

No fasting, full bladder or medicine change is usually required for diagnostic neck ultrasound. A biopsy appointment has separate preparation and should not be assumed from the scan booking.

Clothing and jewellery Wear a loose or open-necked top. Remove necklaces, chains and high collars so the area from the jaw to the collarbones can be reached.
Medicines Continue regular medicines, including anticoagulants, for a diagnostic scan. If FNA or core biopsy is planned, follow the procedure team's individual instructions and do not stop treatment yourself.
Previous imaging and treatment Bring earlier ultrasound, CT, MRI, PET, thyroid or cancer reports and any previous cytology or pathology. Mention radiotherapy, neck surgery and the side of previous treatment.
Children or limited neck movement Explain developmental, sensory or mobility needs when booking. A child may bring a comfort item, and neck extension can be reduced for pain, breathing difficulty or spinal restriction.
  • Point to the exact lump and say how long it has been present and whether it changes.
  • Mention recent sore throat, dental infection, skin lesion, ear problem, fever, tuberculosis exposure or travel.
  • List any persistent hoarseness, swallowing pain, mouth ulcer, one-sided ear pain, weight loss or night sweats.
  • Tell the team if there are several lumps or if nodes are enlarged elsewhere in the body.
  • Do not repeatedly squeeze a painful, inflamed or pulsating neck lump.

What Happens During the Scan?

1 The history and exact lump are confirmed

You identify the palpable point. The radiologist reviews duration, infection symptoms, earlier cancer, surgery, imaging and whether the referral requests one site or complete nodal mapping.

2 You lie with the neck supported

You usually lie on your back with a small cushion beneath the shoulders and turn the head gently. The position is adapted if extension causes pain, dizziness or breathing difficulty.

3 The palpable area is scanned

Gel is applied from the jaw to the collarbone. A high-frequency probe identifies whether the lump is a lymph node, gland, cyst, vessel or another superficial structure.

4 Relevant node levels are surveyed

The probe follows the nodal chains on the requested side and often compares the opposite side. Abnormal nodes are labelled by level and measured in more than one plane.

5 Architecture and blood flow are recorded

Cortex, fatty hilum, necrosis, calcification, matting and surrounding tissues are assessed. Doppler maps central and peripheral vascular patterns.

6 A next step is recommended when needed

The report may suggest clinical follow-up, ENT review, dedicated thyroid or salivary imaging, contrast CT or MRI, FNA, core biopsy or microbiology sampling.

The examination commonly takes 20–30 minutes. Complete bilateral mapping, multiple lumps, previous surgery or an additional thyroid or salivary protocol can require longer.

What Do Common Report Terms Mean?

Reactive / benign-appearing lymph node The shape, hilum, cortex and flow pattern favour immune response rather than malignancy. The clinical team still checks that the node reduces as expected and symptoms resolve.
Preserved fatty hilum The bright central nodal tissue remains visible. This is commonly reassuring but is not an absolute guarantee, particularly in lymphoma and early metastatic disease.
Cortical thickening The darker outer tissue is thicker or uneven. Infection, inflammation and tumour can all alter the cortex, so focality and other features matter.
Rounded node / increased short axis The node is less elongated than expected. This increases concern in some locations but cannot establish a diagnosis without the rest of the pattern.
Cystic or necrotic node Part of the node appears fluid-filled or broken down. Metastasis, tuberculosis and suppurative infection are among the possibilities, and sampling or cross-sectional imaging is often needed.
Calcification Bright mineral foci are present. The pattern can provide clues, including in thyroid-cancer metastases and previously treated disease, but it is not interpreted alone.
Peripheral or mixed vascularity Blood flow is detected around the edge or in an altered distribution. It can increase suspicion but inflammation and technical factors can also affect flow.
Matted or conglomerate nodes Several nodes appear joined together. Tuberculosis, inflammation, lymphoma and metastatic disease can all produce nodal clusters.
Extranodal extension suspected The border is irregular and surrounding tissues may be involved. CT or MRI is usually better for mapping the full extent.
No pathological cervical lymphadenopathy No nodes meet the study's abnormal morphological criteria. This does not exclude disease in the throat, deep neck, upper chest or a very early microscopic process.

What Can Neck Ultrasound Not Determine Reliably?

  • The exact cause of every enlarged node without cytology, histology, microbiology and clinical context.
  • That a node is harmless solely because it is small, painless or retains a fatty hilum.
  • The tonsils, tongue base, nasopharynx, voice box and other mucosal surfaces where a primary tumour may arise.
  • Retropharyngeal, skull-base, deep mediastinal or other nodes hidden by air and bone.
  • The full extent of a deep infection or suspected extranodal spread without CT or MRI.
  • Whether a cystic lateral neck mass in an adult is a congenital cyst without appropriate further work-up.
  • Whether lymphoma, tuberculosis or metastasis is absent when morphology overlaps with a reactive pattern.
  • A confident normal result when the palpable target was not identified or lies outside the scanned field.

Ultrasound is one part of neck-mass assessment. Continued growth or persistent clinical concern should prompt reassessment even when an earlier node was described as reactive.

When is a Needle Sample Recommended?

Sampling may be advised when a node has suspicious or indeterminate features, remains unexplained, is the best target for cancer staging, or requires testing for tuberculosis, lymphoma or another specific condition.

Fine-needle aspiration / FNA A thin needle collects cells or fluid for cytology and selected laboratory tests. In an adult neck mass at increased cancer risk, FNA is generally preferred to an unplanned open biopsy.
Core-needle biopsy A larger needle obtains small tissue cylinders and preserves more architecture. It may be preferred for suspected lymphoma or after a nondiagnostic FNA, depending on specialist advice.
Additional testing Samples may need microbiology, flow cytometry, molecular testing or HPV-related testing according to the suspected disease. The radiologist and clinical team plan this before the procedure.

A diagnostic ultrasound appointment does not automatically include biopsy. Do not stop blood-thinning medicine unless the procedure team gives an individual plan.

What Happens After the Scan?

You can wipe away the gel and resume normal food, medicines and activity. The report identifies the palpable structure, relevant nodal levels, morphology and Doppler findings and states whether follow-up, further imaging, ENT assessment or sampling is recommended.

A reassuring reactive pattern may be followed clinically to ensure the node shrinks. An indeterminate or suspicious node may require contrast CT or MRI and ultrasound-guided FNA or core biopsy. Results from imaging, cytology, histology and microbiology are interpreted together.

Seek earlier review if a lump grows, becomes fixed, recurs or is joined by persistent hoarseness, swallowing difficulty, one-sided ear pain, weight loss, night sweats or fever.

Myth vs Fact

Myth Every enlarged neck node means cancer.
Fact Infection and inflammation are much more common, especially in children. Persistence, location, examination and the complete ultrasound pattern determine the next step.
Myth A painless neck lump is safe to ignore.
Fact Reactive nodes, lymphoma and metastatic nodes may all be painless. A persistent or growing adult neck lump needs assessment even when it does not hurt.
Myth Ultrasound can always prove why a node is enlarged.
Fact Ultrasound triages morphology and selects a needle target. Cytology, histology, microbiology and deeper imaging may be needed for the final diagnosis.
Myth A cystic neck mass in an adult is always a congenital branchial cyst.
Fact Cystic lymph-node metastasis can look similar. Adult lateral cystic masses require appropriate ENT examination, cross-sectional imaging and sampling until the diagnosis is secure.

Frequently Asked Questions

Do I need to fast?

No. Eat, drink and take regular medicines normally unless another scan or a biopsy procedure has separate instructions.

Will the scan hurt?

It is usually painless. Gentle pressure over an inflamed node may be tender. Tell the radiologist about severe pain, breathing difficulty, recent surgery or restricted neck movement.

Why are both sides of the neck examined?

Comparison helps identify asymmetry and map the distribution of nodes. The extent still depends on the referral; the report should state when only a focused region was assessed.

Can a large node still be reactive?

Yes. Infection can produce large nodes, while some abnormal nodes remain small. Shape, cortex, hilum, internal change, flow, site and clinical history matter more than a single length measurement.

How long do reactive nodes take to settle?

They usually reduce as the illness resolves but may remain palpable for several weeks. Return for review if a node grows, becomes hard or fixed, returns, or does not follow the clinician's expected course.

Are swollen glands common in children?

Yes, particularly with viral, throat, dental and skin infections. Persistent growth, supraclavicular nodes, systemic symptoms or a child who appears unwell requires paediatric assessment.

Will a biopsy be done during the same appointment?

Not unless it was specifically requested, planned and consented. Sampling requires the correct laboratory pathway and separate medicine and aftercare instructions.

What if the report says “reactive” but the lump keeps growing?

Return to the referring clinician. The change in behaviour matters and may justify repeat examination, contrast CT or MRI, ENT review or tissue sampling.

Does a normal scan exclude throat cancer?

No. Ultrasound cannot inspect most throat mucosa or every deep node. Persistent hoarseness, swallowing pain, mouth lesions or one-sided ear pain needs clinical and often ENT examination.

When will I receive the result?

The radiologist prepares a report for the referring clinician. Significant or urgent findings are communicated through the appropriate pathway. Ask how and when the result will be discussed.

Related Patient Guides

Lymph nodes, thyroid nodules, salivary masses, vessels, soft-tissue lumps and symptoms arising inside the nose require different examinations.

Radiology Soft-Tissue Lump Ultrasound Superficial Lump / USG Soft Tissue Read scan guide → Radiology Thyroid Ultrasound USG Thyroid / Thyroid-Nodule Scan Read scan guide → Radiology Carotid Doppler Ultrasound Carotid Duplex / Neck-Artery Scan Read scan guide → Radiology Salivary-Gland Ultrasound Parotid / Submandibular / Salivary-Stone Scan Read scan guide → ENT Camera Examination of the Nose Diagnostic Nasal Endoscopy Read procedure guide →

A Note From Our Doctors

The information on this page is intended to help you understand your condition. It should not be considered a diagnosis or a substitute for a consultation with a qualified medical professional.

Every patient is unique. The same symptom can have different causes in different individuals, and the most appropriate investigations and treatment depend on your medical history, examination findings, age, existing medical conditions and test results.

At SR Speciality Hospital, we believe in treating the whole patient—not just a symptom, scan or laboratory report. Every treatment plan is individualised after careful medical evaluation.

Radiology Appointments

Have you been advised to undergo neck or lymph-node ultrasound?

Contact the hospital with the exact lump location and referral. Mention rapid growth, breathing or swallowing symptoms, tuberculosis exposure, previous cancer, neck surgery and whether biopsy was also requested.

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