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Zorluk: OrtaHematology and Oncology

A 64-year-old man presents to the emergency department with a 2-week history of progressive shortness of breath, a nonproductive cough, and facial fullness. He has a 45-pack-year smoking history. His temperature is 37.1°C (98.8°F), blood pressure is 138/85 mmHg, pulse is 102/min, and respirations are 22/min. Pulse oximetry is 94% on room air. Physical examination reveals prominent swelling and erythema of the face and neck. The jugular veins are distended, and dilated superficial veins are visible over the anterior chest. Pulmonary auscultation reveals decreased breath sounds at the right lung base but no wheezing or crackles. Cardiac examination shows normal heart sounds with no murmurs or gallops.

Laboratory studies show:
TestResult
Leukocytes8,200/mm³
Hemoglobin14.5 g/dL
Platelets250,000/mm³
Thyroid-stimulating hormone (TSH)0.2 µU/mL (Normal: 0.4–4.0)
Free T41.1 ng/dL (Normal: 0.9–2.4)

Which of the following is the most appropriate next step in management?

  1. A
    Echocardiography to assess right ventricular function
  2. B
    Administration of nebulized albuterol and oral glucocorticoids
  3. Computed tomography of the chest with intravenous contrastCevap
  4. D
    Blood cultures and initiation of broad-spectrum intravenous antibiotics
  5. E
    Initiation of intravenous levothyroxine

Cevap

Computed tomography of the chest with intravenous contrast
The correct answer accurately identifies the need for imaging to evaluate a mechanical venous obstruction. The patient presents with classic signs of Superior Vena Cava (SVC) syndrome: dyspnea, facial swelling, plethora, jugular venous distension, and prominent collateral veins on the anterior chest. In a patient with a significant smoking history, this is most commonly caused by a malignancy compressing the SVC. Computed tomography (CT) of the chest with intravenous contrast is the most appropriate next step to confirm the diagnosis, identify the extent of the obstruction, and evaluate the underlying mass.

Adım Adım Çözüm

1
Analyze the physical examination findings.
The combination of facial swelling/plethora, jugular venous distension, and prominent superficial veins on the anterior chest is identified.
These findings are the hallmark triad of Superior Vena Cava (SVC) syndrome, representing impaired venous return from the head, neck, and upper extremities.
2
Correlate the physical findings with the patient's demographics and history.
A 64-year-old man with a 45-pack-year smoking history is at extremely high risk for thoracic malignancies, particularly bronchogenic carcinoma.
Malignancy (most commonly small cell lung cancer or squamous cell carcinoma) is the leading cause of SVC syndrome, often due to direct external compression of the vessel by a right upper lobe tumor or mediastinal lymphadenopathy.
3
Determine the optimal initial diagnostic modality.
Computed tomography (CT) of the chest with intravenous contrast is selected.
Contrast-enhanced CT is the gold standard for diagnosing SVC syndrome. It identifies the level and extent of the venous blockage, maps collateral pathways, and helps locate the underlying tumor to guide subsequent biopsy and treatment (e.g., radiation or stenting).

Anahtar Kavram

Diagnosis and initial management of Superior Vena Cava (SVC) syndrome
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Konular

Hematology and Oncology

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