Patients with one tumor accounted for 67.6% of the total, patients with two tumors accounted for 25%, and patients with three tumors accounted for 7.4% of the total.
BN có 1 khối u chiếm tỷ lệ 67,6%; BN có 2 khối u chiếm 25%; BN có 3 khối u chiếm 7,4%.