What is the appropriate evaluation and management for a patient presenting with cervical lymphadenopathy, cough, and night sweats?

Immediate Evaluation for Tuberculosis and Malignancy

A patient presenting with cervical lymphadenopathy, cough, and night sweats requires urgent evaluation for tuberculosis and malignancy—these constitutional symptoms ("B symptoms") are red flags that demand prompt diagnostic workup, not watchful waiting.

Risk Stratification and Initial Assessment

This symptom triad is highly concerning and warrants immediate action. The combination of:

• Night sweats (constitutional/B symptom)
• Cough (respiratory involvement)
• Cervical lymphadenopathy (structural finding)

...creates a clinical picture suspicious for either tuberculosis or lymphoma (including Hodgkin lymphoma) 1.

Key Historical Features to Elicit

Ask specifically about:

• Duration: Lymph nodes present ≥2 weeks without fluctuation indicate increased malignancy risk 2
• TB risk factors: Prior TB exposure, travel to endemic areas, HIV status, immunosuppression 3
• Additional B symptoms: Fever, unintentional weight loss (>10% body weight), alcohol-induced pain 1, 4
• Respiratory symptoms: Hemoptysis, productive cough, dyspnea 3
• Demographics: Age >40, male sex, smoking history increase malignancy risk 2, 5

Critical Physical Examination Findings

Examine for features indicating malignancy 2:

• Size >1.5 cm (abnormal)
• Firm/hard consistency (versus soft/rubbery)
• Fixed to adjacent tissues (non-mobile)
• Supraclavicular location (always abnormal and high-risk) 5
• Skin ulceration overlying nodes
• Matted or fused nodes 4

Diagnostic Algorithm

Step 1: Immediate Testing (Do Not Delay)

Do NOT give empiric antibiotics when constitutional symptoms are present—this delays diagnosis of serious disease 2. The guideline explicitly states antibiotics should only be considered when there's clear infectious etiology, and even then, reassessment within 2 weeks is mandatory.

Order immediately:

1. Chest X-ray - Essential for both TB and lymphoma evaluation 3
2. Complete blood count with differential - May reveal lymphocytosis, anemia, or other hematologic abnormalities 4
3. Tuberculosis testing:
   • Sputum for acid-fast bacilli (AFB) smear and culture
   • Xpert MTB/RIF assay (preferred over microscopy when available) 3
   • Tuberculin skin test or interferon-gamma release assay
4. ESR/CRP - Elevated in both TB and lymphoma 4
5. HIV testing - Critical given TB risk and lymphoma association 3

Step 2: Imaging

If chest X-ray shows mediastinal lymphadenopathy or is concerning:

• CT chest with contrast - Evaluates mediastinal involvement, lung parenchyma 1
• Consider CT neck if cervical nodes are extensive or concerning features present 2

Step 3: Tissue Diagnosis

Biopsy is mandatory when constitutional symptoms are present with persistent lymphadenopathy 2, 4. Do not wait beyond 2 weeks.

Biopsy approach:

• Fine-needle aspiration (FNA) can be initial approach for cervical nodes 6
• Core needle biopsy provides more tissue architecture
• Excisional biopsy is gold standard when FNA is non-diagnostic or if lymphoma suspected 4, 6
• For TB: Send tissue for AFB smear, culture, and PCR 6
• For lymphoma: Ensure adequate tissue for histology, immunohistochemistry, and flow cytometry 1

Critical Pitfalls to Avoid

1. Never give corticosteroids empirically - They mask lymphoma histology and delay diagnosis 4, 5

2. Do not prescribe antibiotics for "trial of therapy" when constitutional symptoms are present - This is only appropriate for clearly infectious presentations WITHOUT B symptoms, and requires reassessment in 2 weeks 2

3. Do not adopt "watchful waiting" - Constitutional symptoms with lymphadenopathy demand tissue diagnosis 2, 4

4. Do not rely solely on FNA - If initial FNA shows granulomas but is culture-negative for TB, proceed to excisional biopsy as TB culture can take weeks and false negatives occur 6

5. Do not miss supraclavicular nodes - These are always pathologic and have highest malignancy risk 5

Special Considerations

If TB is Suspected (High-Prevalence Area or Risk Factors)

• Initiate respiratory isolation precautions
• Screen household contacts
• If high drug-resistance risk (prior TB treatment, contact with resistant case), obtain cultures with susceptibility testing 3

If Lymphoma is Suspected

• PET-CT for staging once diagnosis confirmed 1
• Urgent hematology/oncology referral
• Hodgkin lymphoma commonly presents in young adults with painless cervical adenopathy and B symptoms 1

The presence of night sweats with lymphadenopathy and cough eliminates the option of conservative management—this patient needs definitive diagnosis within 2-4 weeks maximum 2, 4.