Table 1: Prognostic factors for local recurrence and survival.

Local recurrence
Univariate prognostic factorsMultivariate Prognostic Factors

Previous unplanned excision Lower grade tumoursPrevious surgery

Survival
Univariate prognostic factorsMultivariate Prognostic Factors

Grade of tumours
Development of metastases
Not developing metastases
Age at diagnosis
Size at resection