Hilson’s perfusion index and scintigraphic assessment of renal ectopia and fusion anomalies

Objective (1) To assess the perfusion functions of the kidneys by Hilson’s perfusion index and (2) to evaluate the renal functions of the patients with renal ectopia and fusion anomalies by dynamic renal scintigraphy. Cite this article as: Cayir D, Bozkurt M, Gültekin SS, Karacalioglu AÖ. Hilson’s Perfusion Index and Scintigraphic Assessment of Renal Ectopia and Fusion Anomalies. Med J SDU 2020; 27(1): 9-15. RENAL EKTOPİ VE FÜZYON ANOMALİLERININ SİNTİGRAFİK DEĞERLENDİRİLMESİ VE HİLSON PERFÜZYON İNDEKSİ Süleyman Demirel Üniversitesi Tıp Fakültesi Dergisi Hilson’s Perfusion Index in Renal Anomaly Materials and Methods A total of 959 patients referred for Tc-99m DTPA dynamic renal scintigraphy were investigated retrospectively. We evaluated the functions and diuretic response of the kidneys on the time-activity curves (TACs) and performed quantitative analysis. Hilson’s index was used for the evaluation of perfusion of the kidneys. Results Renal ectopia and fusion anomalies were reported in 29 (3%) patients. The mean length of the kidneys with pelvic ectopic kidneys were significantly shorter than the orthotopic kidneys (91.0 mm ± 18.9 and 111.0 mm ± 10.3, respectively, p = 0.001). The mean value of Hilson’s perfusion index was significantly higher in the kidneys with ectopia compared to the orthotopic kidneys (86.4 ± 67.1 vs. 36.8 ± 18.0, respectively, p = 0.001). There was no significant difference when we compared the perfusion/extraction functions and the excretion functions of the kidneys among crossed-fused renal ectopic (CFRE), pelvic ectopic, and horseshoe kidneys (p = 0.079 and p = 0.879, respectively). Extraction functions were significantly impaired in the pelvic ectopic kidneys compared to the orthotopic kidneys (p = 0.001). There was no significant difference between excretion functions of pelvic kidneys and orthotopic kidneys (p = 0.116). Conclusion Hilson’s perfusion index may be useful in scintigraphic assessment of perfusion functions of the kidneys with renal ectopia and fusion anomalies.