Tsukasa Ikeura, MD, PhD, from the Third Department of Internal Medicine, Kansai Medical University, Osaka, Japan shares this New Methods article titled "Fluorescence cytology with 5-aminolevulinic acid in EUS-guided FNA as a method for differentiating between malignant and benign lesions (with video)." 5-aminolevulinic acid (ALA), a photosensitizer, is metabolized into protoporphyrin IX (PpIX) in the …
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