The noninflammatory myopathies are a diverse group of diseases, some of which may mimic the autoimmune-mediated idiopathic inflammatory myopathies in their clinical presentation. They include certain metabolic, toxic, and infectious…
Mucopolysaccharidosis and other lysosomal storage diseases are rare, chronic, and progressive inherited diseases caused by a deficit of lysosomal enzymes. Patients are affected by a wide variety of symptoms. For…
Although perceived as a rare condition, joint hypermobility syndrome is common. Its prevalence in rheumatology clinics is extremely high. Early estimates suggest that it may be the most common of…
SAPHO syndrome is a disorder characterized by S ynovitis, A cne, P ustulosis, H yperostosis, and O steitis. As the osteoarticular and skin manifestations often do not occur simultaneously and…
Retroperitoneal fibrosis (RPF) is a condition characterized by the presence of inflammation and fibrosis in the retroperitoneal space, for which no standard diagnostic criteria exist. Historically, treatment has focused on…
This article presents an updated overview of hypertrophic osteoarthropathy and digital clubbing for the practicing rheumatologist. Discussion includes a brief historical perspective, its definition, incidence and prevalence, classification, pathology and…
This article acquaints the reader with disorders of the skin that might mimic systemic sclerosis but whose pathology is localized to the skin and/or has extracutaneous manifestations that are different…
Amyloidosis is the name for protein-folding diseases characterized by extracellular deposition of a specific soluble precursor protein that aggregates in the form of insoluble fibrils. The classification of amyloidosis is…
Erdheim-Chester disease (ECD) is a rare form of non-Langerhans’ cell histiocytosis. Diagnosis of ECD is based on the identification in tissue biopsy of histiocytes, which are typically foamy and immunostain…
This article reviews the microbiology, pathophysiology, epidemiology, clinical manifestations, diagnostic testing, and treatment of Whipple’s disease, an illness caused by Tropheryma whipplei and characterized by multivariate clinical manifestations including an…
