Regional cerebral blood flow abnormalities in patients with primary hyperparathyroidism.

Introduction: We assessed the alterations in regional cerebral blood flow (rCBF) in patients with primary hyperparathyroidism (PHP) before parathyroidectomy by semiquantitative analysis of brain single photon emission computed tomography (SPECT) images.

Methods: Included in this prospective study were 14 patients (mean age 47.6 +/- 10.

Detection of tracheoesophageal fistula caused by ingestion of a caustic substance by esophageal scintigraphy.

A 4-year-old boy was referred for scintigraphic evaluation of esophageal transit 24 hours after he had ingested sodium hydroxide. After oral administration of Tc-99m sulfur colloid, scintigraphy showed marked and prolonged retention of the radioactive bolus in the middle and lower thirds of the esophagus. Three weeks after ingestion of the caustic substance, repeat scintigraphy was requested to evaluate esophageal transit and gastric-emptying.