title: Cerebrotendinous Xanthomatosis Presenting with Infantile Spasms and Intellectual Disability.
abstract: Cerebrotendinous xanthomatosis (CTX) is an inborn error of metabolism leading to progressive multisystem disease. Symptoms often begin in the first decade of life with chronic diarrhea, cataracts, developmental delay, intellectual disability, and cerebellar or pyramidal dysfunction. Later manifestations include tendon xanthomas, polyneuropathy, and abnormal neuroimaging. Pathogenic biallelic variants in CYP27A1 leading to compromised function of sterol 27-hydroxylase result in accumulation of detectable toxic intermediates of bile acid synthesis rendering both genetic and biochemical testing effective diagnostic tools. Effective treatment with chenodeoxycholic acid is available, making early diagnosis critical for patient care. Here we report a new patient with CTX and describe the early signs of disease in this patient. Initial symptoms included infantile spasms, which have not previously been reported in CTX. Developmental delay, mild intellectual disability with measured cognitive decline in childhood, was also observed. These clinical signs do not traditionally compel testing for CTX, and we highlight the need to consider this rare but treatable disorder among the differential diagnosis of children with similar clinical presentation. Increased awareness of early signs of CTX is important for improving time to diagnosis for this patient population.
authors.affiliation: Department of Pediatrics, Section of Genetics, University of Colorado School of Medicine, Aurora, CO, USA. Austin.Larson@UCDenver.edu.|Children's Hospital Colorado, Mail Stop 153, 13123 E 16th Ave, Aurora, CO, 80045, USA. Austin.Larson@UCDenver.edu.
authors.forename: Austin
authors.initials: A
authors.lastname: Larson
authors.affiliation: Department of Pediatrics, Section of Genetics, University of Colorado School of Medicine, Aurora, CO, USA.
authors.forename: James D
authors.initials: JD
authors.lastname: Weisfeld-Adams
authors.affiliation: Departments of Pediatrics, Pharmacology, Neurology and Otolaryngology, University of Colorado School of Medicine, Aurora, CO, USA.
authors.forename: Tim A
authors.initials: TA
authors.lastname: Benke
authors.affiliation: Department of Molecular and Human Genetics, Baylor College of Medicine, One Baylor Plaza, Houston, TX, 77030, USA. pbonnen@bcm.edu.
authors.forename: Penelope E
authors.initials: PE
authors.lastname: Bonnen
keywords: Cataracts; Cerebrotendinous xanthomatosis; Developmental delay; Infantile spasms; Intellectual disability