Renal erythrocytosis.
D004906:Erythrocyte Count; D006801:Humans; D006869:Hydronephrosis / Q000150:complications*; D007680:Kidney Neoplasms; D011086:Polycythemia / Q000209:etiology*
ERYTHROCYTE COUNT; HYDRONEPHROSIS/complications; KIDNEY/neoplasms; POLYCYTHEMIA/etiology