What differential diagnoses should be considered in suspected pulmonary embolism (PE)?

Updated: Jun 06, 2019
  • Author: Daniel R Ouellette, MD, FCCP; Chief Editor: Zab Mosenifar, MD, FACP, FCCP  more...
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Answer

The differential diagnoses are extensive, and they should be considered carefully with any patient thought to have pulmonary embolism. These patients also should have an alternative diagnosis confirmed, or pulmonary embolism should be excluded, before discontinuing the workup. Additional problems to be considered include the following:

  • Musculoskeletal pain

  • Pleuritis

  • Pericarditis

  • Salicylate intoxication

  • Hyperventilation

  • Silicone pulmonary embolism [44]

  • Lung trauma

  • Mediastinitis, acute

Sickle cell disease

Sickle cell disease often creates a diagnostic difficulty with regard to pulmonary embolism. A chest infection is often the presenting symptom. Hypoxemia, dehydration, and fever lead to intravascular sludging within pulmonary (among others) vasculature. This promotes a vicious cycle, further exacerbating local hypoxemia, ultimately leading to local tissue infarction. This process is further worsened by bone marrow infarction, which may cause release of fat emboli that lodge in the pulmonary circulation. [45]


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