Anna Duat Rodriguez1, Michaela Prochazkova2, Saturnino Santos Santos3, Oscar Rubio Cabezas4, Veronica Cantarin Extremera2, Luis Gonzalez-Gutierrez-Solana2. 1. Department of Pediatric Neurology, Hospital Infantil Universitario Niño Jesús, Madrid, Spain. Electronic address: annaduatr@gmail.com. 2. Department of Pediatric Neurology, Hospital Infantil Universitario Niño Jesús, Madrid, Spain. 3. Ear, Nose and Throat Department, Hospital Infantil Universitario Niño Jesús, Madrid, Spain. 4. Department of Clinical Genetics, Hospital Infantil Universitario Niño Jesús, Madrid, Spain.
Abstract
BACKGROUND: CAPOS syndrome (cerebellar ataxia, areflexia, pes cavus, optic atrophy, and sensorineural hearing loss) is a rare disease that has been reported in 22 patients so far. In all cases, the mutation c.2452G>A (p.Glu818Lys) in the ATP1A3 gene was identified. Patients typically present at an early age with an acute-onset fever-induced episode of ataxia frequently associated with encephalopathy and weakness. They usually present one to three episodes. The acute symptoms improve within days, but most patients show slow progression afterward. METHODS: We describe three new patients, a woman and her two sons diagnosed with CAPOS syndrome. A systematic review of literature on previously reported patients was performed. RESULTS: The first son presented with acute-onset ataxia, encephalopathy, and sensorineural hearing loss, induced by febrile illness. The second one developed generalized areflexia and mild instability without an acute episode. The mother had been previously diagnosed with sensorineural hearing loss and optic nerve atrophy. The c.2452G>A mutation in ATP1A3 was found in all three patients. CONCLUSION: Only 25 Individuals with CAPOS syndrome have been reported, including our family. This is the first time a Spanish family has been described. The fact that both siblings were assessed before the first acute-onset episode contributes to the description of early symptoms and signs of the disease, which could aid early diagnosis and management before the onset of acute episodes.
BACKGROUND:CAPOS syndrome (cerebellar ataxia, areflexia, pes cavus, optic atrophy, and sensorineural hearing loss) is a rare disease that has been reported in 22 patients so far. In all cases, the mutation c.2452G>A (p.Glu818Lys) in the ATP1A3 gene was identified. Patients typically present at an early age with an acute-onset fever-induced episode of ataxia frequently associated with encephalopathy and weakness. They usually present one to three episodes. The acute symptoms improve within days, but most patients show slow progression afterward. METHODS: We describe three new patients, a woman and her two sons diagnosed with CAPOS syndrome. A systematic review of literature on previously reported patients was performed. RESULTS: The first son presented with acute-onset ataxia, encephalopathy, and sensorineural hearing loss, induced by febrile illness. The second one developed generalized areflexia and mild instability without an acute episode. The mother had been previously diagnosed with sensorineural hearing loss and optic nerve atrophy. The c.2452G>A mutation in ATP1A3 was found in all three patients. CONCLUSION: Only 25 Individuals with CAPOS syndrome have been reported, including our family. This is the first time a Spanish family has been described. The fact that both siblings were assessed before the first acute-onset episode contributes to the description of early symptoms and signs of the disease, which could aid early diagnosis and management before the onset of acute episodes.
Authors: Christian P Roenn; Melody Li; Vivien R Schack; Ian C Forster; Rikke Holm; Mads S Toustrup-Jensen; Jens P Andersen; Steven Petrou; Bente Vilsen Journal: J Biol Chem Date: 2018-11-08 Impact factor: 5.157
Authors: Ida Stenshorne; Magnhild Rasmussen; Panagiotis Salvanos; Chantal M E Tallaksen; Laurence A Bindoff; Jeanette Koht Journal: Cerebellum Ataxias Date: 2019-02-08
Authors: Aikaterini Vezyroglou; Rhoda Akilapa; Katy Barwick; Saskia Koene; Catherine A Brownstein; Muriel Holder-Espinasse; Andrew E Fry; Andrea H Németh; George K Tofaris; Eleanor Hay; Imelda Hughes; Sahar Mansour; Santosh R Mordekar; Miranda Splitt; Peter D Turnpenny; Demetria Demetriou; Tamara T Koopmann; Claudia A L Ruivenkamp; Pankaj B Agrawal; Lucinda Carr; Virginia Clowes; Neeti Ghali; Susan Elizabeth Holder; Jessica Radley; Alison Male; Sanjay M Sisodiya; Manju A Kurian; J Helen Cross; Meena Balasubramanian Journal: Neurology Date: 2022-07-18 Impact factor: 11.800