Paediatric cervical lymphadenopathy: an evidence-based approach for GPs

Introduction

Neck lymphadenopathy is a common reason for paediatric consultations. Palpable lymph nodes are the most common neck swellings found on paediatric examination, with a prevalence of 45% in otherwise healthy children. ¹ While most cases are benign and self-limiting, GPs must recognise red flags for serious causes. This article outlines key features in presentation and management.

What do the various terms used in description of lymph node abnormalities mean?

Box 1 defines the commonly used relevant terms.

Box 1. Definition of terms used in describing lymph node abnormalities^1–4 .

Term	Definition
Lymphadenopathy	Abnormal size or consistency of a lymph node
Reactive lymphadenopathy	Non-malignant lymphadenopathy in response to immune stimulation (from infective or non-infective causes)
Lymphadenitis	Inflammation or infection of the lymph node itself, usually erythematous and tender
Suppurative lymphadenitis	Pus formation in a lymph node

What are the key points to cover in the history?

A detailed history can point to specific differential diagnoses, guiding diagnosis and management. Key considerations include:

• The onset and duration can be acute (≤2 weeks), subacute (2–6 weeks), or chronic (>6 weeks). ¹

• Preceding symptoms — coryza, upper respiratory tract infections (URTIs), or local infections (for example, tonsilitis or otitis media) — suggest reactive causes. ^2,3

• Associated symptoms may include cough, sore throat, oral ulcers, otalgia, ear or nasal discharge, rash, or other regional lymphadenopathy. Abdominal, ocular, or joint symptoms may suggest infective and rheumatological causes. ^2–4

• Systemic symptoms, and B-symptoms (fever, weight loss, and/or night sweats), may suggest more serious causes. ⁴

• Risk factors — recent immunisations, immunosuppression, or intrauterine exposure to congenital infections (for example, TORCH) — are relevant. ^1,3 Uncontrolled eczema can lead to overdrive of immune system and lymphadenopathy. ^2,5

• Environmental and drug exposure — exposure to tuberculosis (TB)-endemic areas, cats (Bartonella), unpasteurised dairy/infected meat (Brucella), or specific medications (for example, anticonvulsants) — are relevant. ^2,6,7

What should be covered in examination?

Examination should follow principles of spotting an unwell sick child to identify those needing urgent care. Areas to cover include:

• Inspection — look for asymmetry and skin changes, including erythema. Restricted neck movement may indicate pain and/or torticollis, often seen in deep neck space infections. The location can be described as within the anterior or posterior triangle relative to the sternocleidomastoid muscle, or more precisely using specific lymphatic chain names or neck levels. ^6,7

• Palpation — assess size, consistency, tenderness, mobility, and tethering. ⁴ Midline lumps should be assessed for movement with swallowing and tongue protrusion: thyroid lumps move with swallowing, and thyroglossal duct cysts move with both swallowing and tongue protrusion, whereas lymph nodes do not move with either. Nodes <1 cm in the anterior cervical chain are often normal in children. ^2,8 Clinicians often overestimate node size compared with ultrasound, so use of callipers could improve accuracy. ⁸

• Ear, nose, and throat (ENT) examination — examine oropharynx, ears, and nasal mucosa for infection or URTI signs.

• Systemic examination — assess for the hydration status, generalised lymphadenopathy, rash, hepatosplenomegaly, pallor, or bruising. Weigh the child if weight loss is suspected. ^4,6

What are the red flags that should prompt a referral to a specialist?

Key referral guidelines, based on best available evidence, include National Institute for Health and Care Excellence (NICE) guidelines, ³ for which the Children’s Cancer and Leukaemia Group provides a supporting resource. ⁴ The Healthier Together lymphadenopathy pathway also outlines a useful traffic-light triage system. ² The British Medical Ultrasound Society ⁵ and the British Society for Antimicrobial Chemotherapy ⁶ provide additional guidance on when to consider ultrasound or antibiotics.

Red flags for malignancy include:

• supraclavicular and popliteal nodes;

• nodes >2 cm, persisting >6 weeks;

• firm, fixed, or matted nodes;

• systemic symptoms (fever, weight loss, night sweats, pruritus, or bone pain);

• associated hepatosplenomegaly or pallor; and

• lack of resolution following antibiotics.

The authors have endeavoured to combine and summarise these guidelines in a flowchart (Figure 1).

Figure 1. Traffic-light system of triaging paediatric lymphadenopathy in primary care based on the UK national guidelines.^2–6 CRP = C-reactive protein. EBV = Epstein–Barr virus. ENT = ear, nose, and throat. ESR = erythrocyte sedimentation rate. FBC = full blood count. JIA = juvenile idiopathic arthritis. LDH = lactate dehydrogenase. LFT = liver function test. PIMS = paediatric inflammatory multisystem syndrome. SLE = systemic lupus erythematosus. TB = tuberculosis. U&E = urea and electrolytes.

What investigations should be ordered in general practice?

In primary care, no tests are typically needed for low-risk cases (Figure 1). However, the decision to investigate or refer, and the urgency, is nuanced and involves shared decision making with parents, balancing risk factors, the child’s age, and both the clinician’s and parents’ level of concern, along with local provisions. For unexplained or amber-category cases, consider blood tests such as full blood count (FBC), blood film, C-reactive protein (CRP), erythrocyte sedimentation rate (ESR), and Epstein–Barr virus (EBV) serology, along with referral for ultrasound. ^3,4

If an abscess or unwell child is suspected, refer directly to secondary care. For cases suggestive of malignancy, ultrasound should be requested via 2-week wait pathway, but, for those with red flags, same-day discussion with specialists is advised to guide further investigations (potentially as an inpatient). Developmental lumps should be referred to outpatient ENT, whereas atypical infective or rheumatological features should be discussed with and/or referred to paediatrics; urgency of referrals depend on clinical judgement and locally agreed pathways. ³ Whether investigations are initiated by primary or secondary care, and their urgency depends on local protocols, early discussion with specialists is usually advised to clarify any concerns.

In secondary care, further investigations may include urea and electrolytes (U&E), liver function tests (LFTs), targeted viral and bacterial serologies (including for TB, Bartonella, Brucella, and TORCH infections), reticulocytes, lactate dehydrogenase (LDH), immunoglobulins, and autoimmune screen. ^2,3,7 Ultrasound remains the first-line imaging modality to assess the size, morphology, and vascularity. ⁵ Chest X-ray and cross-sectional imaging are requested only if chest involvement or lymphoma are suspected. ^4,7

What is the management of the commonest cause of paediatric lymphadenopathy?

Management depends on the cause. The most common cause is reactive lymphadenopathy, which is often self-limiting and observed if there are no red flags. Bacterial causes may require antibiotics, whereas viral infections are managed symptomatically. Acute lymphadenitis may progress to sepsis or suppurative lymphadenitis, necessitating intravenous antibiotics and drainage if indicated; therefore, either follow-up or careful safety-netting advice is paramount. ⁶

Non-tuberculous mycobacterial (NTM) lymphadenitis typically presents as a slowly enlarging, minimally tender lump in a well child, often with violaceous discoloration. Diagnosis is clinical, which can be confirmed histologically or by culture. Management options include watchful waiting, antibiotics, or surgical excision. ⁷

In which conditions might GPs be expected to provide shared care after secondary care review?

Parents may have queries about neck wounds post-biopsy or drainage, requiring assessment and liaison with secondary care. GPs may also support long-term antibiotics and follow-up for TB or NTM lymphadenitis. ^6,7

Children who undergo chemoradiotherapy may need ongoing support for adverse effects such as mucositis, pancytopenia, hypothyroidism, or hearing loss. ^3,4

Conclusion

A structured approach to history, examination, and investigation helps GPs distinguish self-limiting from serious cases of paediatric cervical lymphadenopathy, improving outcomes through timely recognition and referral.

Funding

The authors received no funding for this work.

Provenance

Freely submitted; externally peer reviewed.

Acknowledgements

The authors would like to thank Peter Deutsch (ENT Consultant at Worcestershire Royal Hospital) for introducing them to the valuable Clinical Practice articles. Behrad Barmayehvar would also like to thank all the ENT consultants at the Birmingham Children’s Hospital for their incredible teaching and support.

Competing interests

The authors have declared no competing interests.