COSY is a joint initiative of 11 partners, comprising two hospitals (Necker – Enfants Malades – AP HP and Hôpital Mère Enfant – HCL), 6 research groups (including hospital-university instituts (Instituts Hospitalo- Universitaires (IHUs), 3 industrial partners and one patient association. It combines all the necessary skills to propose innovative tools in physiopathology, genetics, imaging and care reorganization.

Conjointly, we aim to re-define a new standard of care and to offer a unique multidisciplinary service organization dedicated to Overgrowth syndromes (OS) patients.