男　３２岁，５年前洗澡时，无意发现左肩胛骨处有一核桃大小肿块，质硬，不活动，不疼，以后逐渐长大。体检：一般情况好，左肩胛骨上外侧可见一肿块，大小约１４ｃｍ×１２ｃｍ×４ｃｍ，基底宽，质硬，表面凹凸不平，不活动，无压疼，表面皮肤无改变，活动左上肢时，肿块随 When the boy was 32 years old and had a bath five years ago, he did not intend to find that there was a walnut lump in the left shoulder blade, which was hard, inactive and painless. He later grew up. Physical examination: The general condition is good. A lump is seen on the left and right side of the scapula. The size is about 14cm x 12cm x 4cm. The base is wide, hard, the surface is uneven, there is no movement, there is no pressure pain, there is no change in the surface skin, and when the activity is on the upper left limb, the mass With