Question 1541
{"accessible":false,"alternatives":[{"id":7692,"text":"18F-FDG"},{"id":7693,"text":"18F-florbetapir"},{"id":7694,"text":"67Ga-citrate"},{"id":7695,"text":"68Ga-DOTATATE"},{"id":7696,"text":"99Tc-sestamibi"}],"archived":false,"correctAlternativeId":7695,"explanation":"\u003cp\u003e\u003ca href=\"/articles/gallium-68-dotatate\"\u003e68Ga-DOTATATE\u003c/a\u003e has an affinity for the somatostatin receptor and well-differentiated gastrointestinal \u003ca href=\"/articles/gastrointestinal-neuroendocrine-tumours-3\"\u003eneuroendocrine tumors\u003c/a\u003e generally have overexpression of these receptors, especially subtype 2A.\u003c/p\u003e\u003cp\u003e\u003ca href=\"/articles/f-18-fluorodeoxyglucose\"\u003e18F-FDG \u003c/a\u003emay be used for high grade or dedifferentiated neuroendocrine tumors which have high metabolic activity and which are no longer expressing the somatostatin receptors.\u003c/p\u003e","id":1541,"imageUrl":null,"imageAttribution":null,"imageAttributionCaseInfo":null,"firstQuestionPath":"/questions/3094","nextQuestionPath":null,"relatedArticles":[{"id":25754,"title":"Gastrointestinal neuroendocrine tumors","link":"/articles/gastrointestinal-neuroendocrine-tumours-3?lang=us"}],"alsoUsedIn":[],"stem":"\u003cp\u003eWhich radiotracer has a\u0026nbsp;high sensitivity in localizing low grade / well-differentiated gastric neuroendocrine tumors \u0026gt;1 cm\u0026nbsp;and is also useful for staging?\u003c/p\u003e","menuLinks":[{"text":"Report problem with question","url":"https://docs.google.com/forms/d/e/1FAIpQLSfO3soWYhOjJ7yErSysyCe5V4A1CqW7WK3rDA7MtAkecMGqNw/viewform?entry.1624461248\u0026entry.553583435=https://radiopaedia.org/questions/1541"}],"attemptsPercentages":[{"alternativeId":"7693","percentage":1},{"alternativeId":"7694","percentage":3},{"alternativeId":"7696","percentage":8},{"alternativeId":"7692","percentage":7},{"alternativeId":"7695","percentage":82}],"promptToLogin":false,"questionManager":false,"articleId":"gallium-68-dotatate"}