Hello, could you please tell if ck level 205 for my 8 old son indicates something bad? he is also have muscle weakness and toe walking. blood test also showed low level of white cells (3.8) and low level of vitamin d. thank you?

I think a team approach for investigation for possible muscular dystrophy or other neuromusculature disorder is best obtained at a department of neurology at a university hospital near you. The other issues of low wbc & low vitamin D levels will also be addressed by appropriate members of the team.

Results of CK, white cell count and vitamin D level are race dependent. AAs often have high CK total, lower white cell count and vitamin D level than Caucasians. If your son is white, that CK total is slightly high; however, the upper limit also depends on the laboratory. Those results can not fully explain your son's symptoms. If your son is AA, those results are not much outside the norms.