HLA-B27 may be a phenotypic expression of axial spondyloarthritis (SpA), according to a large international study. The study found patients with axial SpA who were positive for HLA-B27 had more severe radiographic damage than those who were negative for HLA-B27, and three quarters of study patients with ankylosis spondyloarthritis were HLA-B27 positive.
Albayda et al. describes a North American cohort of patients with dermatomyositis, reporting that small ubiquitin-like modifier activating enzyme (SAE) autoantibodies are clearly associated with this clinical disease. Patients with this clinical phenotype most commonly present with a rash first, followed by muscle involvement.
New research has examined the autonomic parameters of patients with chronic fatigue syndrome (CFS) using the DePaul Symptom Questionnaire to place patients on a disease spectrum. Researchers found different groups of CFS patients had different levels of autonomic dysfunction and cognitive impairment, suggesting that different CFS criteria may diagnose a spectrum of disease severities and different CFS phenotypes…