产后3个月，出现了甲亢症状，心率快。检查了甲状腺功能和 甲状腺B超。请帮助看看
甲状腺B超结果。
Real-time sonographic imaging was performed with representative images
submitted. The right lobe measures 5*2.8*1.7cm. The left measures 5.4*2*1.
4cm. The isthmus is 5 mm thick. The gland is diffusely heterogenous with a
hypoechoic nodule suggested toward the mid to lower left lobe measuring 6*10
*13mm.
Impression: Heterogeneous gland. Hypoechoic nodule toward the lower pole of
the left lobe.
甲功检查完全是甲亢表现。
请问B超是说明我有甲状腺占位病变吗？最后的Impression 是什么意思？
先行感
