Orthostatic proteinuria revisited: new clinical impact of the “old” clinical entity?

Department of School Health Science, Hirosaki University Faculty of Education, Hirosaki, Japan; Department of Pediatrics, Hirosaki University Hospital, Hirosaki, Japan Correspondence to: Hiroshi Tanaka, MD, PhD. Department of School Health Science, Hirosaki University Faculty of Education, Hirosaki, 036-8560 Japan. Email: hirotana@hirosaki-u.ac.jp. Provenance and Peer Review: This article was commissioned by the editorial office, Annals of Translational Medicine. The article did not undergo external peer review. Comment on: Niu XL, Wu Y, Hao S, et al. Value of micro-proteinuria in combination with ultrasonography of the left renal vein in the diagnosis of orthostatic proteinuria. Ann Transl Med 2019;7:780.