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Difficulty: MediumHematology and Oncology

A 28-year-old man presents to the clinic for evaluation of a painless lump on the left side of his neck that has been progressively enlarging for the past two months. He reports experiencing drenching night sweats and a 5-kg (11-lb) unintentional weight loss over the same period. His temperature is 38.2°C (100.8°F), blood pressure is 120/78 mm Hg, and pulse is 88/min. Physical examination reveals a 4-cm, firm, rubbery, and non-tender lymph node in the left supraclavicular region. There is no other palpable lymphadenopathy, and the liver and spleen are not enlarged on abdominal palpation. A complete blood count is within normal limits. Based on the clinical presentation, there is a high suspicion for Hodgkin lymphoma.

Arrange the following management steps in the most appropriate chronological sequence for the comprehensive evaluation and treatment of this patient.

  1. 1Perform an excisional lymph node biopsy for histopathologic diagnosis.
  2. 2Obtain a whole-body FDG-PET/CT scan for disease staging.
  3. 3Assess baseline cardiac and pulmonary function with an echocardiogram and pulmonary function tests (PFTs).
  4. 4Initiate systemic combination chemotherapy (e.g., ABVD).

Answer

The correct sequence is to first perform an excisional lymph node biopsy to confirm the diagnosis, followed by an FDG-PET/CT scan for staging, then obtain an echocardiogram and PFTs to assess baseline safety, and finally initiate systemic combination chemotherapy.
The comprehensive management of suspected Hodgkin lymphoma follows a strict algorithmic sequence. Initially, a definitive tissue diagnosis must be established using an excisional lymph node biopsy to preserve tissue architecture (fine-needle aspiration is inadequate). Once the diagnosis is confirmed histologically, a whole-body FDG-PET/CT scan is performed to accurately stage the disease (Ann Arbor system), which dictates the treatment plan. Before initiating the standard ABVD chemotherapy regimen, baseline cardiac function (via echocardiography) and pulmonary function (via PFTs) must be assessed to prevent unrecognized, catastrophic doxorubicin-induced cardiotoxicity or bleomycin-induced pulmonary toxicity. Only after all diagnostic, staging, and safety evaluations are completed is systemic chemotherapy initiated.

Step-by-Step Solution

1
Identify the need for a definitive tissue diagnosis.
Perform an excisional lymph node biopsy.
A complete evaluation of lymph node architecture is required to accurately identify Reed-Sternberg cells and diagnose Hodgkin lymphoma. Fine-needle aspiration is insufficient.
2
Determine the clinical stage of the confirmed malignancy.
Obtain a whole-body FDG-PET/CT scan.
Staging (Ann Arbor system) evaluates disease extent and directly dictates the appropriate chemotherapy regimen and duration.
3
Evaluate baseline organ reserve for anticipated chemotherapy toxicities.
Assess cardiac and pulmonary function (Echocardiogram and PFTs).
The standard ABVD regimen includes doxorubicin (which is cardiotoxic) and bleomycin (which is pulmonary toxic). Baseline safety assessments are strictly mandatory before starting treatment.
4
Administer definitive antineoplastic treatment.
Initiate systemic combination chemotherapy.
Therapy can only be safely and effectively administered after diagnosis, staging, and safety assessments are complete.

Key Concept

The sequential management of suspected Hodgkin lymphoma requires definitive tissue diagnosis via excisional biopsy, followed by radiologic staging, baseline evaluation of cardiopulmonary function, and finally the initiation of targeted chemotherapy.
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Topics

Hematology and Oncology

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