Does likelihood of survival differ between patients with single vs. multiple primary melanomas?

Patients with multiple primary melanomas had a higher likelihood of dying than those with a single primary melanoma in a study that used data from registries in the Netherlands. This observational study included nearly 57,000 patients (54,645 with a single primary melanoma and 2,284 with multiple primary melanomas).
Source: EurekaAlert, https://www.eurekalert.org