title: Diagnosis of ectopic gastric mucosa using 99Tcm-pertechnetate: spectrum of scintigraphic findings.
abstract: We highlight the spectrum of scintigraphic findings likely to be encountered in patients with ectopic gastric mucosa with illustrative cases for each such finding. 11 children (aged 4 months to 120 months, all males) underwent (99)Tc(m)-pertechnetate scintigraphic evaluation for ectopic gastric mucosa. Functioning ectopic gastric mucosa was detected in Meckel's diverticulae in three patients, in small bowel duplications in four, in a gastric duplication in one, and in intrathoracic foregut duplication cysts in three. Ectopic functioning gastric mucosa in Meckel's diverticulum, and gastric duplication is visualized simultaneously with the stomach while in intestinal duplications tracer activity can be visualized in the dynamic sequence and even before gastric tracer visualization. In the three patients with intrathoracic duplication cysts, the functioning ectopic gastric mucosa was evident only in the delayed (99)Tc(m)-pertechnetate images, much later than the visualization of stomach activity. Therefore, acquisition of delayed images are useful when the initial images are equivocal or negative in children with intrathoracic foregut duplication cysts. In addition, we suggest a hypothesis of a possible mechanism for the uptake of pertechnetate in ectopic gastric mucosa in some patients with intrathoracic forget duplication cysts. In conclusion, a variety of scintigraphic patterns may be found in patients with ectopic gastric mucosa undergoing (99)Tc(m)-pertechnetate scintigraphy depending upon the location and size of the ectopic tissue.
authors.affiliation: Department of Nuclear Medicine, All India Institute of Medical Sciences, New Delhi, India.
authors.forename: R
authors.initials: R
authors.lastname: Kumar
authors.forename: M
authors.initials: M
authors.lastname: Tripathi
authors.forename: N
authors.initials: N
authors.lastname: Chandrashekar
authors.forename: S
authors.initials: S
authors.lastname: Agarwala
authors.forename: A
authors.initials: A
authors.lastname: Kumar
authors.forename: J B
authors.initials: JB
authors.lastname: Dasan
authors.forename: A
authors.initials: A
authors.lastname: Malhotra
mesh_terms: D002648:Child; D002675:Child, Preschool; D002828:Choristoma / Q000000981:diagnostic imaging*; D003560:Cysts / Q000000981:diagnostic imaging; D005753:Gastric Mucosa; D005767:Gastrointestinal Diseases / Q000000981:diagnostic imaging*; D006801:Humans; D007077:Ileal Diseases / Q000000981:diagnostic imaging; D007223:Infant; D007410:Intestinal Diseases / Q000000981:diagnostic imaging; D007421:Intestine, Small / Q000000981:diagnostic imaging; D008297:Male; D008467:Meckel Diverticulum / Q000000981:diagnostic imaging; D011877:Radionuclide Imaging; D019275:Radiopharmaceuticals; D013670:Sodium Pertechnetate Tc 99m; D013270:Stomach / Q000000981:diagnostic imaging; D013272:Stomach Diseases / Q000000981:diagnostic imaging
chemical_list: D019275:Radiopharmaceuticals; D013670:Sodium Pertechnetate Tc 99m