case_images: PMC10208980_01
case_images: Computed tomography chest showing spontaneous pneumomediastinum
  with/without pneumothorax in patient 1.
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case_images: Seven days after admission, patient developed asymptomatic pneumomediastinum with subcutaneous air followed by subsequent development of pneumothorax (Figure 1).
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case_images: Patient 2: spontaneous pneumomediastinum diagnosed with computed
  tomography chest.
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case_images: HHFNC 55 L/m at 80% FiO2 due to worsening hypoxia on the day of admission. He developed pneumomediastinum, seen on computed tomography pulmonary angiography (CTPA) on day 4 of admission which remained stable (Figure 2).
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case_images: Chest computed tomography demonstrating subcutaneous emphysema in the
  neck.
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case_images: CXR with subsequent subcutaneous emphysema in the neck. Chest CT done on day 9 confirmed the pneumomediastinum present with subcutaneous air in the soft tissues of the neck (Figures 3 and 4).
case_images: Chest computed tomography demonstrating extensive pneumomediastinum.
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case_images: CXR with subsequent subcutaneous emphysema in the neck. Chest CT done on day 9 confirmed the pneumomediastinum present with subcutaneous air in the soft tissues of the neck (Figures 3 and 4).
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case_images: Patient 4: extensive subcutaneous emphysema in the neck.
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case_images: On day 6 of admission, due to new onset and worsening chest pain, chest CT was obtained which revealed pneumomediastinum with subcutaneous emphysema extending into the tissues of the neck (Figures 5-7).
case_images: Chest computed tomography again showing extensive subcutaneous emphysema
  in patient 4.
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case_images: On day 6 of admission, due to new onset and worsening chest pain, chest CT was obtained which revealed pneumomediastinum with subcutaneous emphysema extending into the tissues of the neck (Figures 5-7).
case_images: Chest computed tomography showing pneumomediastinum in patient 4.
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case_images: On day 6 of admission, due to new onset and worsening chest pain, chest CT was obtained which revealed pneumomediastinum with subcutaneous emphysema extending into the tissues of the neck (Figures 5-7).
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case_images: Chest x-ray demonstrating extensive subcutaneous emphysema of the chest
  wall and pneumomediastinum.
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case_images: Day 9: she was transitioned to low-flow nasal cannula at 6 L, and a new pneumomediastinum with subcutaneous emphysema was seen in CXR obtained secondary to new complaint of chest pain (Figure 8).