Maatta is scheduled to undergo surgery next week to remove a tumor from his neck that could be a low-grade thyroid cancer.Maatta, 20, has been cleared to play until the time of the surgery. Dr. Dharmesh Vyas, the Penguins’ team physician said he will likely be able to return to the lineup within four weeks. “Obviously our first concern is for Olli and his health,” Penguins general manager Jim Rutherford said. “He is an outstanding young man and has a tremendous future ahead of him. The doctors tell us that this is a very treatable condition, and that it can be taken care of with the surgery."