Endoscopy is crucial for diagnosing gastrointestinal disorders, but it still relies on histopathology for cancer diagnosis, causing delays and high costs. With this in mind, the EIC-funded MULTISCOPE project addresses this challenge with a revolutionary photonic technology. By combining optical biopsy and cold atmospheric plasma therapy, MULTISCOPE introduces a dual-function device capable of real-time, in vivo diagnosis and immediate therapeutic intervention. The device harnesses spatiotemporal control of light in advanced multimode fibres, overcoming previous limitations. Initially focused on gastrointestinal endoscopy, the technology aims to transform medical diagnostics across various fields, offering reliable, instantaneous diagnoses and targeted cancer treatments without the need for invasive procedures.