[Erythrocytosis and hydronephrosis in a horseshoe kidney].
OBJECTIVE
To report a case of erythrocytosis in a patient with a hydronephrotic horseshoe kidney and normal erythropoietin values.


RESULTS
A hydronephrotic horseshoe kidney was discovered during evaluation to determine the etiology of the erythrocytosis in a 23-year-old male with normal erythropietin values. Blood parameters returned to normal following heminephrectomy. The hydronephrosis had been caused by stenois of the pyeloureteric junction.


CONCLUSIONS
Although erythropoietin values may be normal, hydronephrosis can cause secondary erythrocytosis.
Valero Puerta
J A
JA
Servicio de Urología, Hospital de la Merced, Osuna, Sevilla, España.
Jiménez Gonzalo
F J
FJ
Medina Pérez
M
M
Valpuesta Fernández
I
I
Sánchez González
M
M
López Rodríguez
L
L
D000328:Adult; D003937:Diagnosis, Differential; D004921:Erythropoietin / Q000097:blood; D006801:Humans; D006869:Hydronephrosis / Q000000981:diagnostic imaging / Q000209:etiology* / Q000601:surgery; D007668:Kidney / Q000002:abnormalities* / Q000000981:diagnostic imaging / Q000601:surgery; D052177:Kidney Diseases, Cystic / Q000150:complications* / Q000000981:diagnostic imaging / Q000601:surgery; D008297:Male; D011086:Polycythemia / Q000175:diagnosis / Q000209:etiology*; D011087:Polycythemia Vera / Q000175:diagnosis; D014057:Tomography, X-Ray Computed
D004921:Erythropoietin
Poliglobulia e hidronefrosis, en riñón en herradura.