Orexin-A levels were measured in 97 out of 191 (50.8%) patients, and 59 out of 97 (60.8%) had CSF orexin-A concentration below the cut-off value of 110 pg/mL, consistent with a diagnosis of NT1, including a patient without clinical history of cataplexy. The gene discussed is HCRT; the disease is Cataplexy.