Human papillomavirus shows considerable genetic heterogeneity, and the list of different types is growing.

There appears to be genetic heterogeneity, implying that more than one additional gene is involved in the disease.

System instability is a major contributing factor for genetic heterogeneity.

Having a genetic heterogeneity means that there is a disorder in genetic factors.

Four cases (27%) were, however, representative of genetic heterogeneity.

Four cases (27%) were, however, consistent with genetic heterogeneity at this chromosomal region.

In addition, our data indicate genetic heterogeneity of gastric ulcer disease.

Four tumors were, however, interestingly identified with genetic heterogeneity for chromosome 18p events.

We cannot rule out genetic heterogeneity for these genes and suggest studying more families.

Six families did not link to either locus, indicating genetic heterogeneity.