The normal patched allele is expressed in medulloblastomas from mice with heterozygous germ-line mutation of patched.
Wetmore C, Eberhart DE, Curran T. The normal patched allele is expressed in medulloblastomas from mice with heterozygous germ-line mutation of patched. Cancer Res. 2000 Apr 15; 60(8):2239-46.