In Group 2 (eight forearms), tumors were in both the distal aspect of the ulna and the ulnar side of the distal part of the radius and were in contact with each other.

• 组2（8个前臂）为肿瘤不仅生长于尺骨远端，同时也生长于桡骨远端尺侧，且两者相互交通。