NCIt definition : Human PTCH2 wild-type allele is located within 1p33-p34 and is approximately 21 kb
in length. This allele, which encodes protein patched homolog 2 protein, is involved
in the formation of embryonic structures. Aberrant allelic expression has been linked
to medulloblastoma and basal cell carcinoma, suggesting that variants play a role
in the development of some tumors.;