Neurological Outcome in Cerebrotendinous Xanthomatosis Treated With Chenodeoxycholic Acid: Early Versus Late Diagnosis

Objective: To present the long-term neurological outcome of Jewish Israeli patients with cerebrotendinous xanthomatosis (CTX) after several years of chenodeoxycholic acid (CDCA) treatment. Methods: A cross sectional observational study of all patients with a diagnosis of CTX followed in a referral outpatient clinic during the years 2003-2012. Results: Eighteen patients (10 men) from 11 families were enrolled. Sixteen patients were included in the analysis (2 patients had low compliance for treatment). The mean +/- SD age at last evaluation was 35.0 +/- 9.2 years (range, 16-45 years). After their diagnosis, at age 22.6 +/- 10.8 years, all patients were treated with CDCA. Patients who started treatment after the age of 25 years had worse outcome and were significantly more limited in ambulation (P = 0.004) and more cognitively impaired (P = 0.047). Five patients who started treatment after 25 years of age continued to deteriorate despite CDCA treatment. Conclusions: Beginning CDCA treatment as early as possible is crucial to preventing neurological damage and deterioration in CTX. After significant neurological pathology is established, the effect of treatment is limited and deterioration may continue.