Gall Bladder Activity on Technetium99m-Ethylenedicysteine Renogram Masquerading as Ectopic Kidney.

Tc-EC (Technetium-99m-ethylenedicysteine) is a renal tubular imaging agent introduced as an alternative to Tc-MAG3 (Technetium-99m-mercaptoacetyltriglycine) (1). This radiopharmaceutical can be easily labeled at room temperature and has high radiochemical purity and long stability for at least 8 h. Within 1 h 70% of Tc-EC is excreted in the urine (2).