Clinical Interpretation: Two Neck Ultrasound Reports

Summary of the Two Reports

Key Concern: Progression Over 4 Months

• In March, the nodes were reactive-sized (< 1 cm short axis), distributed bilaterally across many levels - pattern consistent with reactive/infectious lymphadenopathy.
• In July, the largest node is now 17.8 x 8.8 mm at level II, crossing the commonly used 1 cm (10 mm) short-axis threshold that raises concern for pathological enlargement. Level II is the jugulodigastric node group - one of the first-echelon nodes for many head and neck malignancies.

Differential Diagnosis for a 23-Year-Old Male with Progressive Cervical Lymphadenopathy

1. Lymphoma (Hodgkin's or Non-Hodgkin's) - Hodgkin's lymphoma classically affects young adults in the 15-35 age group, often presents with cervical/mediastinal nodes, and is the most important diagnosis to exclude here. Nodes are often painless, rubbery, and progressive. B-symptoms (fever, night sweats, weight loss) should be actively sought.
2. Tuberculosis / Mycobacterial lymphadenitis - The most common infectious cause of chronic cervical lymphadenopathy in young adults in South Asia. TB lymphadenitis (scrofula) typically causes matted nodes and may eventually show central necrosis/caseation on ultrasound. This is high on the differential given the Indian context.
3. Infectious mononucleosis (EBV) - Can cause bilateral, multi-level cervical lymphadenopathy with significant node enlargement. Usually accompanied by fever, pharyngitis, fatigue, and splenomegaly.
4. Reactive lymphadenopathy - Still possible, but the 4-month progression argues against simple reactive nodes, which should have resolved.
5. Other infections: CMV, Toxoplasma, cat scratch disease (Bartonella), syphilis (given bilateral nodes and young age).
6. Kikuchi-Fujimoto disease - Rare but important in young adults (especially Asian populations); causes necrotizing lymphadenitis. Can be associated with neck pain and tender nodes.
7. Head and neck malignancy - Nasopharyngeal carcinoma can present in young adults with cervical lymphadenopathy; less common but should be considered.

Red Flags to Assess Clinically

• Fever, night sweats, unintentional weight loss (>10% body weight) - B-symptoms of lymphoma
• Hard, non-tender, fixed nodes - favor malignancy
• Pharyngitis, tonsillar enlargement, splenomegaly - favor EBV/infectious mono
• Cough, low-grade fever, evening fever pattern, contact history - favor TB
• Duration of symptoms and rate of growth
• Tenderness of nodes (tender usually favors infection; painless favors lymphoma, though TB can also be painless)

Recommended Workup (Next Steps)

• Complete blood count with differential and ESR
• Peripheral smear (for atypical lymphocytes suggesting EBV)
• LDH and uric acid (raised in lymphoma)
• Monospot test / EBV IgM antibody (Paul-Bunnell test)
• Mantoux test (TST) + Quantiferon Gold / IGRA
• Sputum AFB if TB suspected
• HIV test (mandatory in any unexplained lymphadenopathy)
• Toxoplasma IgM, CMV IgM if clinically indicated
• VDRL/RPR to exclude syphilis

• Chest X-ray - to look for mediastinal widening (lymphoma), hilar adenopathy, or pulmonary TB
• CT neck + chest with contrast - if chest X-ray abnormal or lymphoma suspected - gives better anatomical detail than ultrasound - Ultrasound is the correct first-line imaging modality (Fischer's Mastery of Surgery, p. 7972), but CT/PET provides far more staging information once malignancy is on the table

• Given 4-month progression with the largest node now at 17.8 mm, excisional lymph node biopsy (or at minimum core needle biopsy) of the largest Level II node is strongly indicated if initial blood work does not yield a clear diagnosis
• FNA alone is not adequate to rule out lymphoma because it does not preserve lymph node architecture needed for classification (Fischer's Mastery of Surgery, p. 7972)
• Tissue should be sent for: histopathology, AFB culture, flow cytometry (if lymphoma suspected), and immunohistochemistry

Thyroid Note

Bottom Line

Note: This interpretation is for clinical guidance only. The treating physician should correlate with the full clinical history, physical examination findings, and laboratory results.

Diagnostic Report Analysis

Complete Blood Count (CBC)

Coagulation Profile

Liver Function Tests (LFT)

Kidney Panel

Corrected Ca = 10.7 + 0.8 × (4 - 5.0) = 10.7 - 0.8 = 9.9 mg/dL (within normal range)

Inflammatory Markers

Serology

Thyroid Function

Clinical Interpretation in Context of Cervical Lymphadenopathy

Reassuring Findings

• Normal CBC and peripheral smear - no blast cells, no atypical lymphocytes, no pancytopenia. This makes acute leukemia unlikely. WBC is normal at 4.72, not elevated.
• Normal ESR (5 mm/hr) - this is actually very low. Classic lymphoma and TB are typically associated with elevated ESR. A normal or low ESR in progressive lymphadenopathy is somewhat unusual but does not rule out these diagnoses.
• CRP normal - argues against active bacterial infection or significant systemic inflammation.
• LDH normal (146) - LDH is a key marker for lymphoma (especially aggressive types). A normal LDH is somewhat reassuring, but early/low-grade lymphoma can have normal LDH.
• Thyroid normal - thyroid disease excluded.
• Hepatitis B and C negative - excludes viral hepatitis as a cause of lymphadenopathy.
• Uric acid normal - not elevated, arguing somewhat against high tumor burden lymphoma.
• Coagulation normal - no coagulopathy.

Abnormal Findings Requiring Attention

• ALT mildly elevated (59, ULN 41) - mild hepatocellular liver injury. This could reflect: fatty liver, early viral hepatitis (window period for HBsAg), EBV-related hepatitis (very common in young adults with lymphadenopathy), or even lymphomatous infiltration of the liver. This needs follow-up with Anti-HBc (IgM), HBV DNA, EBV IgM/VCA antibodies, and Anti-HCV CLIA/ELISA (rapid tests can miss early infections).

What These Labs Do NOT Rule Out

• Lymphoma - CBC can be entirely normal in early Hodgkin's lymphoma. ESR and LDH can be normal in early disease. The definitive diagnosis requires lymph node biopsy.
• Tuberculosis - CBC, ESR, and CRP can be normal in early TB lymphadenitis. Mantoux/IGRA testing has not been done yet.
• EBV infectious mononucleosis - the monospot test / EBV-specific antibodies were not ordered and are still needed. Peripheral smear showed no atypical lymphocytes, but this can be missed on routine reporting.

Summary of Outstanding Tests Still Needed

1. CECT Neck + Chest - to assess node characteristics and mediastinum (lymphoma staging)
2. Mantoux test + Quantiferon Gold - for TB
3. EBV IgM (VCA), EBV IgG, EBV EBNA - for infectious mononucleosis
4. Anti-HBc IgM + HBV DNA - to complete hepatitis B workup (explain elevated ALT)
5. HIV 1 & 2 antibody - mandatory in unexplained lymphadenopathy
6. Serum LDH repeat - if any change in clinical status
7. Lymph node biopsy (excisional or core) of the Level II node - this remains the most important next step. Current labs cannot exclude lymphoma.

This analysis is for clinical guidance only and should be interpreted by the treating physician in full clinical context.

Integrated Clinical Analysis

Mr. Bhuwan Goswami | 23 years | Male | Neck Pain

THE FULL PICTURE AT A GLANCE

WHAT MAKES THIS CLINICALLY CONCERNING

1. Progressive enlargement - The dominant node has grown from 7.2 mm to 17.8 mm over 4 months. This is not resolution; it is progression. Reactive nodes from a viral illness should shrink within 4-6 weeks.
2. Multi-level bilateral distribution - Nodes are present at cervical levels IA, IB, II, III, IVA, V bilaterally. This widespread, symmetric distribution is characteristic of lymphoma and TB far more than a simple local infection.
3. Duration - This has been present for at least 4+ months. Acute infections do not persist this long without systemic symptoms that would have prompted treatment.

RANKED DIFFERENTIAL DIAGNOSIS

#1 - HODGKIN LYMPHOMA (Top Priority to Exclude)

• Age 23, male (Hodgkin's has a classic bimodal peak at 15-35 years, with 2:1 male predominance)
• Firm, rubbery, progressive cervical nodes at Level II - the classic first-echelon site for Hodgkin's
• Bilateral multi-level adenopathy (levels II, III, IB, IVA, V)
• Absence of B-symptoms (fever, night sweats, weight loss) does not rule it out - many early Hodgkin's patients are asymptomatic
• Normal CBC, normal LDH, normal ESR can all be present in early-stage (Stage I/II) Hodgkin's
• The mildly elevated ALT could reflect early hepatic involvement or be incidental

• Normal CBC only tells you there is no bone marrow failure yet
• LDH is a late marker - it is elevated in aggressive or advanced lymphoma, not early disease
• ESR of 5 mm/hr is actually suspiciously low for an infectious process; low ESR + painless progressive nodes in a young male is a classic Hodgkin's pattern

#2 - TUBERCULOSIS LYMPHADENITIS (Scrofula)

• Single most common cause of chronic cervical lymphadenopathy in young adults in South Asia/India
• TB lymphadenitis is the most common extrapulmonary manifestation of TB
• Bilateral multi-level cervical involvement is very common
• Normal CRP and ESR do not rule it out - especially in an immunocompetent host with early TB, inflammatory markers can be deceptively normal
• No AFB testing, no IGRA/Mantoux has been done yet
• TB can also cause mild liver enzyme elevation (ALT 59) from hepatic TB involvement or drug-induced hepatitis from prior empirical treatment

#3 - EBV INFECTIOUS MONONUCLEOSIS (Unresolved/Chronic Active)

• Affects 15-24 year olds almost exclusively - he is 23
• Causes bilateral, multi-level cervical lymphadenopathy with significant node enlargement
• ALT elevated at 59 - hepatic involvement (transaminitis) is a hallmark of EBV mono, occurring in up to 80% of cases. The 2023 rapid evidence review on infectious mononucleosis specifically states: "The presence of elevated liver enzymes increases clinical suspicion for infectious mononucleosis in the setting of a negative heterophile antibody test result."
• Normal peripheral smear (no atypical lymphocytes reported) is a weak argument against it - atypical lymphocytes can be missed on routine reporting, and chronic/subacute EBV can show normal morphology
• HBsAg and HCV are negative, making viral hepatitis-related lymphadenopathy from those viruses less likely
• No EBV testing has been done - this is a critical gap

#4 - KIKUCHI-FUJIMOTO DISEASE (Histiocytic Necrotizing Lymphadenitis)

• Affects young adults of both sexes (classically young Asian women, but men are affected too)
• Painful or painless cervical lymphadenopathy + fever + flu-like illness
• Self-limiting, but the comprehensive 2023 review (PMID 37383134) notes it is "often mistaken for non-Hodgkin lymphoma" and can mimic TB
• The diagnosis requires lymph node biopsy with histopathology + immunohistochemistry
• His neck pain could represent the tender lymphadenopathy typical of this condition

#5 - REACTIVE LYMPHADENOPATHY (Chronic/Persistent)

#6 - OTHER (Less Likely)

• Non-Hodgkin Lymphoma - less typical at this age for cervical-predominant disease; NHL in adolescents/young adults tends to present with more systemic features and rapid progression
• Cat scratch disease (Bartonella) - usually unilateral, regional; not bilateral multi-level
• Toxoplasmosis - can cause bilateral cervical lymphadenopathy; not tested yet
• Sarcoidosis - can cause cervical lymphadenopathy, bilateral; often with elevated serum calcium (his calcium 10.7 is borderline - but corrects to normal after albumin correction)
• HIV-related lymphadenopathy - not tested; mandatory to exclude

THE KEY CLUE: ALT ELEVATED + NORMAL ESR/CRP

• Normal CRP (0.9) + Normal ESR (5) argues against acute bacterial infection and most common viral infections that cause intense inflammation
• Elevated ALT (59) points toward hepatotropic or lymphotropic viral infection (EBV, CMV, early HBV) or hepatic infiltration (lymphoma, sarcoidosis)
• Together, this pattern best fits EBV mono with hepatitis or early lymphoma without systemic inflammation - both of which can show this exact pattern

WHAT MUST BE DONE NEXT

Immediate (This Week) - Blood Tests

Imaging (Within 1-2 Weeks)

Definitive Step - Lymph Node Biopsy

• Excisional biopsy of the largest Level II node is preferred
• Tissue must be sent for: histopathology, flow cytometry, immunohistochemistry, AFB culture + PCR, and tissue EBV in-situ hybridization
• Core needle biopsy is an alternative if excision is not immediately feasible, but tissue yield may be inadequate for lymphoma subtyping

PRIORITY ORDER IN ONE LINE

Do EBV serology + IGRA + HIV today → CECT chest this week → lymph node excisional biopsy if no clear diagnosis within 2 weeks.

Disclaimer: This is a clinical decision-support analysis. All diagnostic and therapeutic decisions must be made by the treating physician with full clinical correlation.

Does the Blood Work Rule Out a Recent Infection as the Cause?

What the Blood Work DOES Say Against Active/Recent Infection

What the Blood Work Does NOT Rule Out

• No monospot test was done
• No EBV IgM/IgG was ordered
• CRP and ESR can be normal or near-normal in EBV mono - EBV does not always drive a strong CRP response
• The elevated ALT (59) is actually a signature finding of EBV hepatitis - it occurs in up to 80% of EBV mono cases
• Peripheral smear can miss atypical lymphocytes, especially if the infection is subacute or resolving
• You cannot say EBV has been excluded without EBV serology

• Same logic as EBV. CMV causes lymphadenopathy with hepatitis (elevated ALT), mild or no systemic inflammation, and a normal WBC. Serology not done.

• Causes bilateral cervical lymphadenopathy in young adults, often with minimal inflammatory response. Serology not done.

• TB lymphadenitis can present with completely normal CRP, ESR, WBC, and peripheral smear, especially in early or paucibacillary disease
• Mantoux and Quantiferon Gold have not been done
• A normal ESR does not exclude TB in an immunocompetent person

The Most Honest Answer

The blood work rules out an active bacterial infection and acute systemic inflammation with reasonable confidence. But it does not rule out viral causes (EBV, CMV, Toxoplasma) or TB - all of which can produce reactive lymphadenopathy with a perfectly normal CBC, ESR, and CRP.

Bottom Line for Clinical Decision-Making

FNAC Report Analysis

What the FNAC Report Actually Says

Microscopic Findings (verbatim):

"Smears are cellular and show inflammatory cells comprising of predominantly monomorphic lymphocytes. Few neutrophils are also seen. The background shows RBC. Granuloma are not seen."

Pathologist's Diagnosis:

"To rule out the possibility of Lymphoma/Leukaemia, Kindly do: 1. Clinicoradiological correlation 2. CBC and detailed blood work up"

Breaking Down What This Means

"Predominantly monomorphic lymphocytes"

• Monomorphic means all the lymphocytes look the same - they are of a single, uniform type
• In a normal reactive lymph node, you expect a polymorphic (mixed) population - small lymphocytes, large lymphocytes, plasma cells, macrophages, germinal center cells, all in varying stages
• When a lymph node shows predominantly monomorphic lymphocytes, it means the normal architectural variety is absent - all cells look the same
• This pattern on cytology raises the flag for lymphoma, where a single clone of malignant lymphocytes proliferates and crowds out the normal mixed population

"Granuloma are not seen"

• Tuberculosis lymphadenitis characteristically shows epithelioid granulomas with or without caseation necrosis on FNAC
• The absence of granulomas makes TB lymphadenitis less likely on this sample
• However - FNAC has sampling limitations. A node with TB can sometimes miss granulomas if the needle hits the wrong area. TB is not fully excluded by this alone.

"Few neutrophils"

The Pathologist's Advice

Why FNAC Cannot Diagnose or Exclude Lymphoma

• How the cells are arranged within the node (follicular vs diffuse pattern)
• The presence of Reed-Sternberg cells in their correct tissue context (Hodgkin's)
• Immunohistochemical markers (CD15, CD30, CD20, CD3, etc.)
• Flow cytometry for clonality

Integrating Everything - The Full Picture Now

What the FNAC Changes

What Must Happen Now - Urgently

Step 1: Flow Cytometry on FNAC Sample (If Material Remains)

• Clonal B-cell or T-cell populations (diagnostic of lymphoma)
• CD4:CD8 ratio abnormalities
• Aberrant antigen expression

Step 2: Excisional Lymph Node Biopsy - This Cannot Be Delayed Further

• Histopathology with H&E staining - assess nodal architecture
• Immunohistochemistry panel (CD20, CD3, CD15, CD30, CD10, BCL2, Ki-67, PAX5) - classify lymphoma subtype
• Flow cytometry on fresh tissue - clonality assessment
• AFB culture + PCR - still cover for TB
• EBV in-situ hybridization (EBER) - EBV is linked to both Hodgkin's and some NHL subtypes

Step 3: Blood Tests Still Pending

• EBV IgM/IgG (VCA + EBNA)
• HIV 1&2 (4th generation)
• Quantiferon Gold (IGRA) for TB
• LDH + Serum ferritin (tumor markers)
• CECT Neck + Chest to assess mediastinum and stage nodal disease

Bottom Line

This analysis is for clinical guidance only. All decisions must be made by the treating physician.