Low-glucose/High-fat Intake Dietary Regimen as a Tool for Empowering Diagnostic Accuracy of 2-[18F]FDG PET/CT in Lepidic-predominant Growth Lung Adenocarcinoma

This study is testing whether following a low-sugar, high-fat (ketogenic-style) diet for 7 days before a PET/CT scan can improve the accuracy of detecting a slow-growing type of lung cancer called lepidic-predominant adenocarcinoma (LPA). Standard PET scans sometimes miss this cancer because it doesn't use as much sugar as other tumors. **You may be eligible if...** - You are 18 or older - A CT scan has found a lung nodule that may be this type of cancer, or a biopsy has confirmed it - The nodule is at least 10mm in size - Your general health is good enough to participate (ECOG 0–2) - You are willing and able to follow a controlled ketogenic diet for 7 days **You may NOT be eligible if...** - You have kidney failure - You have type 1 diabetes - You have pancreatitis or severe cholesterol problems - You have had another active cancer in the past 3 years - You have serious psychiatric or medical conditions that would prevent participation - You are pregnant or breastfeeding Talk to your doctor to see if this trial is right for you.