6610 Emphasizing the evaluation of autonomic dysfunctioncontributes to the diagnosis of ROHHAD Syndrome -- Based on a comparative analysis of two center ROHHAD Syndrome case reports and reported literature

Abstract Disclosure: Y. Wang: None. L. Chen: None. C. Gong: None. Background: ROHHAD is the acronym of rapid-onset obesity with hypothalamic dysfunction, hypoventilation and autonomic dysfunction, it is an extremely rare and potentially fatal disease.The purpose of this study is to describe the clinical symptoms and timelines of ROHHAD syndrome. Methods: All patients with ROHHAD syndrome were included. Patients from 2007 to2019 published previously was regarded as group 1. We searched for the keyword "ROHHAD" in the PUMBED database, and included all literature describing theclinical symptoms of ROHHAD patients (group 2, from October 2019 to August 2023).We compared and analyzed the above two sets of data with our data (group 3). Results: In the past 2 years, we diagnosed 16 cases of ROHHAD syndrome totally, with a male to female ratio of 8:8. Mean BMI z score was 4.23 ± 1.70, and the age of rapid obesity was 3.17 (1.67, 7.92) years old, ranging from 3 to 22.5 kg/year. The age at which hypoventilation, hypothalamic dysfunction, and autonomic dysfunction occurred was 5.55 (3.61, 8.25) years old, 4.46 (1.83, 9.25) years old, 3.42 (1.83, 8.00) years old, respectively. The most common autonomic dysfunction were cardiovascular manifestations (13 cases), thermal dysregulation and excessive sweating (each with 11 cases). Totally 13 cases had emotional, cognitive and behavioral abnormalities, 7 cases had neurogenic tumors. Case 2 had neurogenic tumors more than 5 years before rapid obesity, cognitive and behavioral abnormalities more than 2 years ago. Case 10 had abnormal pain sensation shortly after birth, and following polyuria in 2 years before rapid obesity. A total of 116 patients including 100 cases previously reported and 16 cases in this study were analyzed. Compared with the incidence rates of rapid obesity, central hypoventilation and hypothalamic dysfunction in patients in this study, there was no statistically significant difference between three groups. Among patients who had autonomic dysfunction (group 1 vs group 2 vs group 3), thermal dysregulation was 65.7% vs 17.0% vs 68.8%, cardiovascular manifestations was NA vs 12.8% vs 81.2%, excessive sweating was 28.6% vs 10.6% vs 68.8%, gastrointestinal disturbances was 11.4% vs 8.5% vs 62.5%, strabismus was 25.7% vs 12.8% vs 62.5%, and sleep disturbance was NA vs 6.4% vs 50.0%, all p< 0.05. The incidence of abnormal emotion, cognition and behavior was NA vs 29.8% vs 81.2% (p<0.05). Conclusion: The incidence of autonomic dysfunction in 16 patients of this study is100%, with multiple manifestations of autonomic dysfunction coexisting. The incidenceof autonomic dysfunction and abnormal emotion, cognition and behavior in reportedcases from different eras were significantly lower than those of our study, indicating theimportance of fully evaluating the autonomic dysfunction and limbic system. Fewpatients may occur tumors or autonomic dysfunction before rapid obesity. Presentation: 6/3/2024