The mean diameter of primary tumor was 5.4 ± 1.9 cm, only 6.7% of cases had primary tumors smaller than 3 cm.
U nguyên phát có kích thước trung bình là 5,4 ± 1,9 cm, chỉ 6,7% trường hợp u nguyên phát ≤ 3 cm.