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Context The Ehlers-Danlos Syndromes (EDSs) are a set of rare heritable disorders of connective tissue, characterized by defects in the structure and synthesis of extracellular matrix elements that lead to a myriad of problems including joint hypermobility and skin abnormalities. Because EDS affects multiple organ systems, defining clear boundaries and recognizing overlapping clinical features shared by disease phenotypes is challenging. Objectives The objective of this study was to seek evidence of phenotypic subgroups of patients with distinctive symptom profiles and describe these resulting subgroups. Methods Data were extracted from a repository assembled 2001–2013 by the National Institute on Aging Intramural Research Program. Agglomerative hierarchical clustering was used to form distinct subgroups of patients with respect to the domains of pain, physical and mental fatigue, daytime sleepiness, and nighttime sleep. Domains were selected based on literature review, clinician expertise, and guidance from patient advisors. Results One hundred seventy-five patients met all inclusion criteria. Three subgroups were identified. The Pain Dominant subgroup (39 patients) had the highest mean pain values, but lowest mean values of other symptoms. The High Symptom Burden subgroup (71 patients) had high mean values in all domains. The Mental Fatigue subgroup (65 patients) had a high mean value for mental fatigue and daytime sleepiness, but a lower mean value for pain. Conclusion The subgroups aligned with clinical observation of the heterogeneous nature of EDS, with overlapping symptoms between subtypes and a wide divergence in degree of symptoms within subtypes. This exploratory study helps characterize the various phenotypes and comorbidities of patients with EDS.

Background & Aims The Joint Hypermobility Syndrome (JHS) is a common connective tissue disorder characterized by joint hyperflexibility, dysautonomia, and chronic pain. Gastrointestinal (GI) symptoms are reported in JHS patients attending rheumatology clinics, but the prevalence and symptom pattern of previously undiagnosed JHS in GI clinics are unknown. Methods By using validated questionnaires, a prospective cross-sectional study in secondary care GI clinics estimated the prevalence of JHS in new consecutively referred patients, compared GI symptoms in patients with and without JHS, and by using multiple regression determined whether the burden of GI symptoms in JHS patients was dependent on chronic pain, autonomic, psychological, and medication related factors. A positive control group consisted of JHS patients referred from rheumatology clinics with GI symptoms (JHS-Rh). Results From 552 patients recruited, 180 (33%) had JHS (JHS-G) and 372 did not (non-JHS-G). Forty-four JHS-Rh patients were included. JHS-G patients were more likely to be younger, female with poorer quality of life ( P = .02) than non-JHS-G patients. After age and sex matching, heartburn (odds ratio [OR], 1.66; confidence interval [CI], 1.1–2.5; P = .01), water brash (OR, 2.02; CI, 1.3–3.1; P = .001), and postprandial fullness (OR, 1.74; CI, 1.2–2.6; P = .006) were more common in JHS-G vs non-JHS-G. Many upper and lower GI symptoms increased with increasing severity of JHS phenotype. Upper GI symptoms were dependent on autonomic and chronic pain factors. Conclusions JHS is common in GI clinics, with increased burden of upper GI and extraintestinal symptoms and poorer quality of life. Recognition of JHS will facilitate multidisciplinary management of GI and extra-GI manifestations.