title: Take the shadow for the substance.
mesh_terms: D001826:Body Fluids / Q000737:chemistry; D006801:Humans; D007668:Kidney / Q000000981:diagnostic imaging*; D016030:Kidney Transplantation; D008210:Lymphocele / Q000175:diagnosis / Q000000981:diagnostic imaging / Q000209:etiology*; D008297:Male; D008875:Middle Aged; D011183:Postoperative Complications; D011188:Potassium / Q000032:analysis; D011677:Punctures; D014463:Ultrasonography
chemical_list: D011188:Potassium