Jon Lester has been diagnosed with a treatable form of anaplastic large cell lymphoma and will begin treatment within the coming week. ...Information on lymphoma can be found here and here. Also check the SoSH thread; at least a couple members are doctors. ... I wonder if the x-rays taken in connection with his sore back picked this up early.
From the Red Sox's statement on David Ortiz:
David Ortiz was released from Massachusetts General Hospital on Thursday. ...
David's physical examination was normal. The following imaging and functional tests were performed: basic laboratories, electrocardiogram, heart monitoring, echocardiogram, signal averaged electrocardiogram, stress testing, and magnetic resonance imaging. The heart consultants extensively reviewed these tests.
In brief, David's testing was unremarkable or normal except for changes commonly found in well-trained athletes.
Since his return to Boston, David has experienced no further sensations. ... The medical staff will continue monitoring David in the outpatient setting with a device called an event monitor. Further testing, if indicated, will be determined by the results of outpatient monitoring. David's return to play will be reassessed next week.