DARBOY, Wisc. (WFRV) Charlie Knuth's family is left waiting with more questions than answers.

The six-year-old from Darboy, who's been battling a rare skin disease, remains hospitalized at the University of Minnesota. It is still unclear what has made him so sick.

Results from a bone marrow biopsy performed last week initially showed Charlie was unable to produce red or white blood cells or platelets. However, yesterday the results showed there is a small chance he is able to produce them.

The family is left wondering whether Charlie's marrow will recover or whether he will need a re-transplant.

Another bone marrow biopsy is scheduled for Friday.

According to his mother, Trisha, "Charlie is very sick. He doesn't look the same, he doesn't talk the same, he doesn't act the same, and it is the most painful thing I have ever dealt with. To think about it too deeply is to torture myself."

If you would like to send a card to Charlie, here is his address at the hospital:

University of Minnesota

Amplatz Children's Hospital

BMT Unit

Attn: Charlie Knuth

2450 Riverside Ave.

Minneapolis, MN 55454

Local 5 will continue to update you on Charlie's progress.