Diagnostic uncertainty in a young woman with a neck mass
A 28-year-old woman presents with a 3-cm left neck mass that has been slowly enlarging over 6 weeks. She has no history of smoking, alcohol use, or head and neck cancer. She reports night sweats and a 5-kg weight loss over 2 months. Physical exam reveals a firm, mobile mass in level II, and no other lymphadenopathy or organomegaly. CBC shows mild anemia (Hb 105 g/L), and LDH is elevated at 320 U/L. Fine-needle aspiration (FNA) of the mass shows a population of small lymphocytes with some larger atypical cells, but flow cytometry is inconclusive. Imaging with CT shows a 3.2-cm necrotic level II lymph node and no other sites of disease. The patient is anxious about cancer and wants a diagnosis quickly.
1. What is the most appropriate next step in diagnosis, and why?
Read the worked answer
The next step is an excisional biopsy of the lymph node for histopathology, immunohistochemistry, and possibly molecular studies. FNA was inconclusive, and the clinical picture (young age, B symptoms, elevated LDH, necrotic node) raises suspicion for lymphoma, particularly Hodgkin lymphoma or non-Hodgkin lymphoma. Excisional biopsy provides architectural information essential for lymphoma classification. Repeat FNA or core needle biopsy might be considered in some settings, but excisional biopsy is preferred when lymphoma is suspected and FNA is non-diagnostic. Imaging has already staged the disease as limited to one node, but a biopsy is needed for definitive diagnosis. The patient's anxiety should be addressed with clear communication about the rationale and timeline.
2. How would you address the patient's concern about cancer while awaiting biopsy results?
Read the worked answer
Acknowledge her anxiety and explain that the findings are suspicious but not definitive. Emphasize that a biopsy is the gold standard and will provide the information needed to plan treatment if cancer is found. Provide a timeline for the biopsy and results. Offer supportive resources, such as a nurse navigator or social worker. Avoid false reassurance but also avoid alarming language. Discuss that even if lymphoma is diagnosed, it is often treatable, and many patients achieve remission. Encourage her to bring a family member or friend to appointments for support.