The three missions of the Jérôme Lejeune Institute

Bébé porteur de trisomie 21



The Jérôme Lejeune Institute offers its patients specialised medical support throughout their life thanks to a medical and paramedical team including:

  • specialist physicians: geneticist, neurologist, neuropaediatrician, paediatrician, orthopaedic surgeon, psychiatrist, geriatrician.
  • speech therapists, psychologist, nurse, social worker, dietician, psychomotor therapist.


A consultation at the Jérôme Lejeune Institution is available to patients and their families for:

  • research on a diagnosis for unexplained mental disabilities.
  • ongoing treatment (coordination between the various medical and medical-social specialities around the patient).
  • prevention of secondary handicaps (thyroid disorders, orthopaedic deformities…).
  • supporting families and treatment centres.





The Jérôme Lejeune Institution combines
care with clinical research.

The Institute conducts and participates in research programmes with its patients. The studies conducted at the Jérôme Lejeune Institute are aimed at enhancing our knowledge and treatment of genetic illnesses with intellectual disabilities.


Clinical studies are currently underway, including:


  • Down syndrome and autoimmune diseases
  • Involves Down’s patients ages 8 to 35.


  • Assessment of the efficacy of folinic acid and thyroid hormone treatment on psychomotor development.





The Jérôme Lejeune Institute offers professionals and families training courses on receiving, supporting and treating persons with a genetic intellectual disability. These courses also include pathologies associated with their diseases. Accommodation for trainees is possible (courses reserved for healthcare students near the end of their studies).

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