A 23-year-old patient experiences sudden severe shortness of breath and sharp right-sided chest pain after a long flight. Lungs are clear bilaterally, and the patient is pale and diaphoretic. Which diagnosis is most likely?

A 23-year-old patient experiences sudden severe shortness of breath and sharp right-sided chest pain after a long flight. Lungs are clear bilaterally, and the patient is pale and diaphoretic. Which diagnosis is most likely?

• A. Pulmonary embolism
• B. Spontaneous pneumothorax
• C. Hyperventilation syndrome
• D. Pleurisy

Answer: (A)

Pulmonary embolism is the most likely diagnosis here. The scenario combines sudden severe shortness of breath with sharp pleuritic chest pain after a long flight, a situation that points to venous thromboembolism from immobility during air travel. A clot that travels to the lungs often produces abrupt dyspnea and pleuritic pain, and patients can look pale and diaphoretic due to acute distress and possible hypoxemia. Importantly, the lungs may be clear on examination because the problem is vascular, not an infectious or inflammatory lung process. The other possibilities don’t fit the pattern as well. A spontaneous pneumothorax would more typically show unilateral changes on examination (decreased breath sounds on one side, possible hyperresonance) and has different risk factors. Hyperventilation syndrome is usually related to anxiety and produces rapid breathing with symptoms like lightheadedness and paresthesias rather than a sudden pleuritic chest pain pattern with clear lungs. Pleurisy can cause sharp chest pain with breathing, but it often accompanies infection or inflammatory processes and may present with a pleural rub or other signs not described here. So, the combination of sudden dyspnea, pleuritic chest pain, pallor, diaphoresis, and recent prolonged immobilization strongly points to a pulmonary embolism.

Pulmonary embolism is the most likely diagnosis here. The scenario combines sudden severe shortness of breath with sharp pleuritic chest pain after a long flight, a situation that points to venous thromboembolism from immobility during air travel. A clot that travels to the lungs often produces abrupt dyspnea and pleuritic pain, and patients can look pale and diaphoretic due to acute distress and possible hypoxemia. Importantly, the lungs may be clear on examination because the problem is vascular, not an infectious or inflammatory lung process.

The other possibilities don’t fit the pattern as well. A spontaneous pneumothorax would more typically show unilateral changes on examination (decreased breath sounds on one side, possible hyperresonance) and has different risk factors. Hyperventilation syndrome is usually related to anxiety and produces rapid breathing with symptoms like lightheadedness and paresthesias rather than a sudden pleuritic chest pain pattern with clear lungs. Pleurisy can cause sharp chest pain with breathing, but it often accompanies infection or inflammatory processes and may present with a pleural rub or other signs not described here.

So, the combination of sudden dyspnea, pleuritic chest pain, pallor, diaphoresis, and recent prolonged immobilization strongly points to a pulmonary embolism.