Assertion: pneumothorax | /r/HasProperty | occult
Facets:
value: in about half of these cases
type: DEGREE
value: in half of these cases
type: TEMPORAL
Source sentences:
text: The pneumothorax can be occult (not readily apparent) in half of these cases, but may enlarge – particularly if mechanical ventilation is required.
text: In about half of these cases, the pneumothorax may be occult; therefore, chest CT should always be performed.