Altered body distribution of [99mTc] pertechnetate in iatrogenic hyperaluminemia.

Failure of intravenously administered [99mTc] pertechnetate to leave the vascular space was observed in a patient with hyperaluminemia due to treatment with an antacid drug containing aluminum hydroxide. A repeat study 3 mo after discontinuing medication, when the plasma aluminum level had fallen, revealed normal in vivo distribution of pertechnetate. It was found that instant thin-layer chromatography, using pertechnetate and an 85% methanol system, can detect plasma aluminum levels as low as 50 microgram/l.