The company Mauna Kea Technologies, a leader in the field of optical biopsy, asked Intactile DESIGN to improve the interface of their flagship product Cellvizio. This innovative device can detect cancerous tumours with high accuracy through a system based on a miniprobe coupled with a microscopic imaging system. Observations of use in a clinical setting, followed by design sessions led us to imagine new functions and interactions. The main challenge of the design was to combine viewing sequences transmitted by the probe and the new tools designed to accompany the gastroenterologist in his medical procedure on the same screen.