title: Unilateral renal agenesis and other causes of the solitary photopenic renal fossa.
abstract: The differential diagnosis of a solitary photopenic defect in the renal fossa observed at renal scintigraphy is extensive. A case of one of the most unusual causes for this finding, renal agenesis, is presented. Additional cases that illustrate the similarity in the radionuclide appearance of other pathologic entities are also presented. Correlation with clinical findings and other imaging modalities is required to accurately distinguish these conditions.
mesh_terms: D002292:Carcinoma, Renal Cell / Q000000981:diagnostic imaging; D003937:Diagnosis, Differential; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D007668:Kidney / Q000002:abnormalities* / Q000000981:diagnostic imaging; D007680:Kidney Neoplasms / Q000000981:diagnostic imaging; D008297:Male; D008875:Middle Aged; D015609:Organotechnetium Compounds; D004369:Pentetic Acid; D011877:Radionuclide Imaging; D013400:Sugar Acids; D013667:Technetium; D016284:Technetium Tc 99m Pentetate; D014517:Ureteral Obstruction / Q000000981:diagnostic imaging
chemical_list: D015609:Organotechnetium Compounds; D013400:Sugar Acids; D013667:Technetium; D004369:Pentetic Acid; C100014:technetium Tc 99m gluceptate; D016284:Technetium Tc 99m Pentetate