Intern Med. 2026 Jul 11. doi: 10.2169/internalmedicine.7166-26. Online ahead of print.
ABSTRACT
Cardiac sarcoidosis is a major cause of complete atrioventricular block. Although fluorodeoxyglucose-positron emission tomography (FDG PET/CT) is valuable for the diagnosis, inadequate fasting may result in a physiological myocardial uptake, making interpretation difficult. Somatostatin receptor scintigraphy (SRS), which does not require fasting, has been reported to detect myocardial inflammation in patients with DCM. We herein report the case of a 72-year-old man who developed complete atrioventricular block after surgery for a duodenal neuroendocrine tumor. In this patient, FDG PET/CT showed a marked cardiac uptake, while SRS findings suggested a low likelihood of cardiac sarcoidosis. In patients with malignancies and cardiovascular diseases, SRS may be useful for excluding cardiac sarcoidosis.
PMID:42438019 | DOI:10.2169/internalmedicine.7166-26