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Difficulty: MediumHematology and Oncology

A 58-year-old male is evaluated in the urgent care clinic for a three-week history of progressive facial swelling, hoarseness, and difficulty breathing. He reports that his symptoms worsen significantly when he bends forward to tie his shoes or lies flat in bed. His medical history is notable for hypertension and a 45-pack-year history of smoking. Vital signs show a blood pressure of 138/88 mm Hg, a pulse of 94/min, and an oxygen saturation of 95% on room air. Physical examination reveals pronounced plethora and edema of the face and neck. The jugular veins are distended and fail to collapse during inspiration. Prominent, dilated superficial veins are visible across his anterior chest. Heart sounds are normal with no murmurs, and lung auscultation reveals mild expiratory wheezing. Which of the following is the most appropriate initial diagnostic step for this patient?

  1. A
    Transthoracic echocardiogram
  2. B
    Sputum culture and empiric broad-spectrum antibiotic therapy
  3. Contrast-enhanced computed tomography of the chestAnswer
  4. D
    Pulmonary function testing
  5. E
    Measurement of serum thyroid-stimulating hormone and free T4

Answer

Contrast-enhanced computed tomography of the chest
This patient's presentation of facial swelling, hoarseness, dyspnea, and dilated veins across the chest is highly characteristic of superior vena cava (SVC) syndrome. The symptoms often worsen when leaning forward or lying flat, as these positions further increase venous pressure in the upper body by utilizing gravity. Given his significant smoking history, a primary bronchogenic carcinoma (such as small cell lung cancer or squamous cell carcinoma) is the most likely cause. Contrast-enhanced computed tomography of the chest is the most appropriate initial diagnostic step because it confirms the diagnosis by demonstrating compromised venous return, identifies the compressing mass, and guides subsequent tissue biopsy or emergent radiation therapy.

Step-by-Step Solution

1
Identify the primary clinical syndrome from the physical exam findings.
The patient presents with facial plethora, upper body edema, hoarseness, and dilated superficial chest veins that worsen with forward bending or supine positioning.
These are the classic signs of superior vena cava (SVC) syndrome, caused by external compression or internal thrombosis of the SVC.
2
Determine the most likely underlying etiology based on patient demographics.
The patient's age and heavy smoking history strongly suggest a primary bronchogenic carcinoma (e.g., small cell or non-small cell lung cancer) as the cause of the obstruction.
Malignancy accounts for the vast majority of SVC syndrome cases.
3
Select the most appropriate initial diagnostic investigation to confirm the etiology.
Contrast-enhanced computed tomography of the chest is required.
CT imaging defines the level and extent of venous blockage, maps collateral drainage pathways, and identifies the exact location and size of the compressing mass, which is essential before pursuing biopsy or targeted therapy.

Key Concept

Diagnosis and initial workup of superior vena cava (SVC) syndrome, an oncologic emergency.
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Topics

Hematology and Oncology

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