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Although these findings were observed only in a few patients, they suggest that melanocytes from the implanted lower third portion of the hair follicle (hair bulb) act as a reservoir in this anatomic location and are able to migrate and repigment achromic areas in vitiligo.

Surgical methods, followed by additional mini-grafting, may be helpful to restore completely the depigmented defects when residual achromia, after treatment with the methods described above, is still present.

The presence of HLA-DQ3 in patients with IGH suggests a genetic basis in a group of renal transplant subjects. HLA-DR8 was found in patients without IGH, and it could play a role as a "protective factor" preventing subjects from developing IGH.