Efficacy of Adjuvant Mitotane Treatment (ADIUVO)

Study Rationale Adrenocortical carcinoma (ACC) is a very rare disease with a high risk of relapse after radical surgery. The efficacy of adjuvant mitotane treatment is suggested by a retrospective multicenter international study showing that postoperative mitotane treatment was associated with a significant reduction of the risk of relapse and death. However, these promising results need confirmation in a randomized prospective study. Caution should be adopted particularly in patients with low risk of disease relapse, in whom the benefit of therapy should be weighted against the side effects. Even if an adjuvant treatment seems justified in patients at high risk of relapse, a randomised prospective study is needed to assess whether such a treatment is efficacious in patients at low-intermediate risk. The purpose of the present study is to determine whether adjuvant mitotane treatment is effective in prolonging the disease free survival in patients with adrenocortical carcinoma at low-intermediate risk of progression who underwent radical resection