Accumulation of 99m-Tc Phytate in the pyelocalyceal system in a patient with chylous ascites - a pitfall resolved by SPECT/CT.

We reported 99m-Tc phytate accumulation in the pyelocalyceal system of the kidney in the lymphoscintigraphic images of a 3.5 months-old male infant with chylous ascites, which was mistaken with the site of lymph leakage. SPECT/CT localized activity in the para-aortic region to the renal pelvis and on delayed images, this was disappeared. Our case illustrates the added value of SPECT/CT for the differentiation of possible false-positive findings in lymphoscintigraphy.