Is scid a problem with the chromosomes?

Yes: There are several different problems with chromosomes that lead to severe combined immunodeficiency disease (scid).

Yes: Scid is severe combined immunodeficiency. It is caused by a genetic problem (in the chromosomes). There are several different genetic problems which can cause various types of scid. Treatment for most forms of scid is primarily a bone marrow transplant. See an expert in immunodeficiency at a major medical center if your child has this diagnosis.