technetium-tc-99m-sulfur-colloid and Muscular-Dystrophies

The principal radionuclide procedures involved in the evaluation of esophageal disorders that are amenable to surgery are illustrated and briefly described. The role of the radionuclide esophagogram (RE) in the diagnosis and management of achalasia, oculopharyngeal muscular dystrophy and its complications, tracheoesophageal fistulae, pharyngeal and esophageal diverticulae, gastric transposition, and fundoplication is discussed. Detection of columnar-lined esophagus by Tc-99m pertechnetate imaging and of esophageal carcinoma by Ga-67 citrate and Tc-99m glucoheptonate studies also is presented.

Topics: Barrett Esophagus; Deglutition Disorders; Diverticulum, Esophageal; Esophageal Achalasia; Esophageal Diseases; Esophageal Neoplasms; Esophagus; Gallium Radioisotopes; Gastroesophageal Reflux; Humans; Muscular Dystrophies; Organotechnetium Compounds; Radionuclide Imaging; Rhenium; Sodium Pertechnetate Tc 99m; Stomach; Sugar Acids; Technetium; Technetium Tc 99m Sulfur Colloid; Tracheoesophageal Fistula

Topics: Adult; Female; Gastric Emptying; Humans; Muscular Dystrophies; Radionuclide Imaging; Stomach; Stomach Diseases; Technetium Tc 99m Sulfur Colloid

Fifteen patients with oculopharyngeal muscular dystrophy underwent cricopharyngeal myotomy for palliation of dysphagia. The aim of this work was to assess the effectiveness of this operation by using a radionuclide pharyngeal emptying study as a new quantitative method in addition to clinical and manometric evaluation. Radionuclide study was performed with the patient in both the upright and the supine positions after ingestion of 15 ml of water labeled with sulfur colloid 99mTc. Computerized data were acquired at 0.5 second intervals for 15 minutes and a pharyngeal time-activity curve was generated. Four quantitative parameters were evaluated: the time for pharyngeal clearance of 25%, 50%, and 75% of the ingested radioactive water and the pharyngeal stasis at 15 minutes. Manometric studies were also performed before and after cricopharyngeal myotomy. The pharyngeal clearance of 25%, 50%, and 75% of the water and pharyngeal stasis at 15 minutes were all improved by cricopharyngeal myotomy, decreasing from 1.2 to 0.9 second (p less than 0.04), 4.2 to 2 seconds (p less than 0.005), 15 to 7 seconds (p less than 0.02), and 10.3% to 6% (p less than 0.01), respectively. Both pharyngoesophageal and tracheobronchial symptoms were also significantly improved by cricopharyngeal myotomy. Manometric evaluation showed a decrease of the upper esophageal sphincter closing pressure from 60.1 mm Hg before to 28.2 mm Hg after the operation (p less than 0.001), and the resting pressure decreased from 34.4 to 15.7 mm Hg (p less than 0.0005). Cricopharyngeal myotomy significantly improves both symptoms and pharyngeal emptying in patients with oculopharyngeal muscular dystrophy.

Topics: Aged; Deglutition; Deglutition Disorders; Esophagus; Female; Humans; Male; Manometry; Middle Aged; Muscles; Muscular Dystrophies; Peristalsis; Pharyngeal Muscles; Pharynx; Radionuclide Imaging; Technetium Tc 99m Sulfur Colloid

In a study designed to evaluate esophageal motor function in muscular dystrophy we examined 13 patients with myotonic dystrophy, 14 patients with "nonmyotonic" muscular dystrophy, and 8 healthy control subjects by manometric and radionuclide transit studies. Patients with myotonic dystrophy exhibited a marked weakness of esophageal contractions and upper esophageal sphincter pressure. Coordination of sphincter relaxation and peristaltic sequences remained unaltered. These changes led to delayed esophageal emptying in all patients with myotonic dystrophy. Although esophageal function was also impaired in the distal esophagus, on histologic studies, morphologic alterations were confined to esophageal striated muscle in a single patient with myotonic dystrophy. In contrast to the marked dysfunction of esophageal motility in patients with myotonia, no such alterations were observed in the "nonmyotonic" form of muscular dystrophy.

Topics: Adult; Deglutition; Esophagogastric Junction; Esophagus; Humans; Manometry; Muscle Contraction; Muscular Dystrophies; Peristalsis; Pressure; Radionuclide Imaging; Technetium Tc 99m Sulfur Colloid