The field of artificial intelligence is booming in medicine and in the field of diagnosis. The data can be varied: x-rays, pathology sections, or photographs. It is considered that 30 to 40% of the 7000 rare diseases described to date cause craniofacial dysmorphia. Their detection sometimes requires the trained eye of a geneticist, because certain phenotypic traits are subtle. These diagnostic difficulties and the fact that certain diseases are extremely uncommon lead to considerable diagnostic delays
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The patient inclusion criteria are: * Patients followed in medical genetics, * Patients undergoing maxillofacial surgery, or craniofacial surgery as part of the management of a pathology, of genetic origin or not, associated with dysmorphism of the head and neck, * Patients for whom frontal and profile facial photographs are taken as part of their treatment. The inclusion criteria for control subjects are: * Patients followed in maxillofacial surgery, for a disease other than a rare disease associated with dysmorphia in the head or neck: acute pathology (wound) or chronic (gynecomastia). * Patients for whom frontal and profile facial photographs are taken as part of their treatment. The criteria for non-inclusion of patients are: * Patients who have undergone facial or skull surgery before the first photo was taken. * Person subject to a judicial safeguard measure. * People objecting to the reuse of their health data. The criteria for non-inclusion of control subjects are: * Pathologies affecting facial symmetry (dental cellulitis, displaced fractures). * Patient followed for dysmorphic syndrome or in whom dysmorphic syndrome has been suspected. * Person subject to a judicial safeguard measure. * People objecting to the reuse of their health data.