The donor for the July 9 procedure will be his daughter, Bobbie Brown, according to Thomas.
“We are both good to go unless I would get an infection, virus or illness before the start of treatment,” he wrote in an email Monday.
As a result, Thomas has curtailed his public schedule and instead plans to participate in some meetings by telephone.
Thomas, 58, announced May 17 he had been diagnosed with the blood- and bone-marrow disease myelodysplastic syndrome. He said tests began to show a steady decline in his blood platelets a little over a year ago.
Myelodysplastic syndrome occurs when the bone marrow does not produce enough healthy blood cells, according to the National Cancer Institute. Being tired and easy bruising or bleeding are among the symptoms, the NCI website said.
In the email, Thomas said he and his daughter have both had extensive medical tests leading up to the transplant. The results of his latest bone-marrow biopsy must be satisfactory before the procedure.
Thomas became a commissioner in 1995. He previously served on the Chambersburg Borough Council and was a radio executive.
Franklin County Commissioners Chairman David Keller previously said the board will be able to take votes because it takes only two of the three members to have a quorum.
This is not the first time Thomas has been treated for a blood disorder. In January 2010, he was diagnosed with aplastic anemia and received treatment at Hershey (Pa.) Medical Center.