A pneumothorax is a collapsed lung, and it was discovered Tuesday after the veteran had a CT scan.
In the fourth quarter of a game against the Boston Celtics on Saturday, McCollum picked up an injury and the team said he would be further evaluated before a prediction and status was determined. He was out of the lineup on Monday when Portland fell to the LA Clippers, 102-90.
Severely shorthanded in that loss, Portland faced Los Angeles but ultimately couldn’t make up for the loss of not only McCollum but the injury to All-Star goalie Damian Lillard (abdomen) and playmaker Anfernee as well. Simons (ankle).
McCollum also did not travel with the Trail Blazers for Wednesday’s game against the Golden State Warriors.
McCollum, 30, has started all 24 games he’s played this season, averaging 20.6 points, 4.1 rebounds and 4.5 assists. The Blazers struggled at first. The loss to the Clippers dropped them to 11-14.
The Associated Press contributed to this report.