I have the same impression.This is most likely a renal amyloidosis.Let us know the results of Congo red stains and electron microscopy.Thank you for posting this interesting case.

• 可见到血管壁和肾小球系膜区粉染无结构样物沉积，应该是肾脏淀粉样变性，等刚果红染色和电镜证实。