succimer and Edema

Topics: Cheek; Chelation Therapy; Child, Preschool; Dimercaprol; Drug Therapy, Combination; Edema; Edetic Acid; Environmental Exposure; Foreign Bodies; Humans; Lead; Lead Poisoning; Male; Pica; Play and Playthings; Protoporphyrins; Seizures; Self-Injurious Behavior; Succimer; Wounds, Gunshot

To develop criteria identifying swollen kidneys on dimercaptosuccinic acid (DMSA) renal scintigraphy in acute pyelonephritis with regard to the DMSA distribution pattern, kidney functional size, and radioactive uptake.. Thirty-eight children aged 15 days to 7 years with known pyelonephritis were examined with DMSA renal scintigraphy. All children were observed 2 or 3 times. In total, 94 scintigrams were evaluated. Qualitative and quantitative criteria for swelling were defined.. Thirty-one observed kidneys satisfied the criteria of swelling. Quantitatively, kidney length and width/length were greater in swollen kidneys. Kidney uptake in percent of injected dose and kidney uptake/background were lower in swollen kidneys. Qualitatively, focal radioactive uptake defects known from a previous examination were sometimes obscured by swelling, and reappeared at follow-up. In 5 children with signs of swelling on repeat imaging, scintigraphy reinfection at the time of swelling was verified.. Swollen kidneys may be the only sign of acute pyelonephritis on DMSA scintigraphy and swelling may obscure focal radioactive uptake defects. Measurement of kidney size and radioactive uptake can help identify swollen kidneys at DMSA scintigraphy and disclose acute pyelonephritis in the absence of overt clinical symptoms.

Topics: Acute Disease; Child; Child, Preschool; Edema; Follow-Up Studies; Humans; Infant; Infant, Newborn; Kidney; Organotechnetium Compounds; Pyelonephritis; Radionuclide Imaging; Radiopharmaceuticals; Succimer; Technetium Tc 99m Dimercaptosuccinic Acid

Tc-99m DMSA renal scintigraphy was performed in 40 renal grafts. Cyclosporin A and glucocorticoids were given to all patients as antirejection therapy, and 11 also were given azathioprine. The kidneys were transplanted 1 to 97 months before the investigation. Seventy percent of kidneys had diffusely altered distribution of Tc-99m DMSA, and 43% had focal clear-cut parenchymal defects. The frequency of parenchymal defects observed on the DMSA scans was higher in patients who suffered manifest acute rejection episodes (8/16 versus 9/24 patients, borderline significance, P < 0.06), but had no relation to the living or cadaveric donor transplant or its function. A combination of peritubular edema and interstitial fibrosis is considered the most probable explanation of diffuse changes. The high frequency of clear-cut parenchymal defects most likely results from symptomatic or asymptomatic rejection episodes complicated by renal transplant infarcts.

Topics: Acute Disease; Adult; Azathioprine; Creatinine; Cyclosporine; Edema; Female; Fibrosis; Glucocorticoids; Graft Rejection; Humans; Infarction; Kidney; Kidney Transplantation; Kidney Tubules; Male; Middle Aged; Organotechnetium Compounds; Radionuclide Imaging; Succimer; Technetium Tc 99m Dimercaptosuccinic Acid