What structure is visualized in a positive Meckel's Diverticulum imaging study?

In a positive Meckel's diverticulum imaging study, the structure visualized is ectopic stomach mucosa. Meckel's diverticulum is a congenital anomaly that results from the incomplete obliteration of the vitelline duct, typically located in the distal ileum. In certain cases, this diverticulum contains ectopic tissue, most commonly gastric mucosa.

When a patient has Meckel's diverticulum with ectopic gastric mucosa, it can secrete hydrochloric acid and lead to complications such as ulceration or gastrointestinal bleeding. During a nuclear medicine imaging study, such as a Tc-99m pertechnetate scan, the presence of this ectopic gastric mucosa can be identified due to its ability to uptake the radiotracer, which is typically absorbed by gastric tissue. This uptake helps differentiate Meckel's diverticulum from other conditions and provides crucial diagnostic information regarding potential complications or the presence of bleeding.

Other options provided do not correlate with the pathology of Meckel's diverticulum. For instance, an ectopic gallbladder would not be relevant to the diverticulum itself, pyloric channel refers to a region of the stomach, and duodenal folds are part of the small intestine's anatomy; none