A -year-old man comes to the physician due to a rapidly enlarging mass on the left side of his neck. Over the past month, he has also experienced drenching night sweats, profound fatigue, and a kg ( lb) weight loss. Vital signs are within normal limits. Physical examination shows a cm, firm, non-tender, and rubbery lymph node in the left anterior cervical chain. The remainder of the examination, including abdominal palpation, is unremarkable. Initial laboratory studies show an elevated serum lactate dehydrogenase (LDH) concentration.
Arrange the following diagnostic and management steps in the most appropriate chronological order for this patient.
- 1Perform an excisional lymph node biopsy
- 2Obtain a whole-body positron emission tomography/computed tomography (PET/CT) scan
- 3Perform a transthoracic echocardiogram
- 4Initiate systemic chemoimmunotherapy
Answer
The correct chronological sequence is: Excisional lymph node biopsy, followed by a PET/CT scan, followed by a transthoracic echocardiogram, and finally the initiation of systemic chemoimmunotherapy.
The standard algorithm for a patient presenting with 'B symptoms' and isolated painless lymphadenopathy begins with establishing a definitive tissue diagnosis via excisional biopsy. Once lymphoma is confirmed, the disease must be staged anatomically using a PET/CT scan. Because the cornerstone of therapy for aggressive non-Hodgkin lymphomas (like DLBCL) and Hodgkin lymphoma involves anthracyclines (e.g., R-CHOP or ABVD), the patient's baseline left ventricular ejection fraction must be assessed via echocardiogram to ensure they can tolerate the cardiotoxic effects. Finally, targeted systemic chemoimmunotherapy is initiated.
Step-by-Step Solution
Key Concept
The standard diagnostic and pre-treatment sequence for aggressive lymphomas requires excisional biopsy for diagnosis, PET/CT for staging, and echocardiography for cardiac clearance before initiating anthracycline-based chemotherapy.