MediAI

  Keywords: Gastrinoma, Zollinger–Ellison Syndrome, Neuroendocrine Tumor, Ga-68 DOTATATE PET/CT Introduction Gastrinoma is a rare but clinically significant functional neuroendocrine tumor (NET) characterized by autonomous gastrin secretion, resulting in profound gastric acid hypersecretion and the development of Zollinger–Ellison syndrome (ZES) . Despite its rarity, gastrinoma remains a critical diagnosis due to its association with refractory peptic ulcer disease, chronic diarrhea, and potential metastatic spread—most commonly to regional lymph nodes and the liver. With the advent of Ga-68 DOTATATE PET/CT , the diagnostic accuracy for gastrinoma and other neuroendocrine tumors has improved dramatically, allowing precise localization of small primary lesions and metastatic lymph nodes that were previously occult on conventional imaging. This article presents a comprehensive, expert-level review of gastrinoma with a local metastatic lymph node causing Zollinger–Ellison synd...

  The Impact of COVID-19 Vaccination on Pediatric Patients: Insights from F-18 FDG PET/MRI Imaging Introduction The COVID-19 pandemic led to unprecedented efforts in vaccine development and distribution. While initial vaccine rollouts targeted adult populations, pediatric vaccination soon followed, particularly for children with underlying conditions such as cancer. A recent study published in the Journal of Nuclear Medicine has shed light on how COVID-19 vaccines affect the immune system in children , as visualized through F-18 FDG PET/MRI imaging. The study provides crucial insight into immune activation in pediatric oncology patients post-vaccination. It highlights the importance of distinguishing between physiological immune responses and pathological signals that could be misinterpreted as tumor recurrence or progression. Methods and Participants A research team from Stanford University, led by Dr. Gaurav Luthria, analyzed F-18 fluorodeoxyglucose (FDG) PET/MR...