title: Reversible erythrocytosis in a patient with a hydronephrotic horseshoe kidney.
abstract: A 33-year-old man with dystrophia myotonica presented with erythrocytosis and an increased plasma erythropoietin concentration. Investigations showed a horseshoe kidney, one moiety of which was grossly hydronephrotic. Fluid aspirated from the latter had a similar erythropoietin concentration to that in plasma. Following partial nephrectomy, the hematocrit and plasma erythropoietin concentration returned to normal.
authors.affiliation: Department of Nephrology, Christchurch Hospital, New Zealand.
authors.forename: R R
authors.initials: RR
authors.lastname: Bailey
authors.forename: B I
authors.initials: BI
authors.lastname: Shand
authors.forename: R J
authors.initials: RJ
authors.lastname: Walker
mesh_terms: D000328:Adult; D004921:Erythropoietin / Q000097:blood*; D006801:Humans; D006869:Hydronephrosis / Q000097:blood / Q000150:complications* / Q000151:congenital; D007668:Kidney / Q000002:abnormalities* / Q000601:surgery; D008297:Male; D009392:Nephrectomy; D011086:Polycythemia / Q000097:blood / Q000209:etiology*
chemical_list: D004921:Erythropoietin