ABSTRACT
Chronic urticaria and concurrent angioedema are disappoiting problems for both physicians and patients. The disease can result from multiple causes and probably does not have a single etiology. Several factors have been identified that appear to be important in the pathogenesis of individual cases, some drugs, food additives, physical factors and internal diseases. In some cases no pathogenesis are identified and those cases are classified as idiopathic. In recent years several articles has emphasized autoimmunity and infections due to Helicobacter pylori. Our article reviewed the etiology of chronic urticari at current concepts.
Subject(s)
Humans , Urticaria/etiology , Angioedema/diagnosis , Angioedema/etiology , Angioedema/immunology , Autoimmunity , Bacterial Infections/complications , Chronic Disease , Parasitic Diseases/complications , Urticaria/diagnosis , Urticaria/immunology , Virus Diseases/complicationsABSTRACT
A melanose neurocutânea é uma síndrome rara caracterizada por nervos melanocíticos congênitos gigantes e excessiva melanose da leptomeninge. A síndrome parece representar um erro na morfogênese do neuroectoderma embrionário. Os autores apresentam o caso e necropsia de um paciente masculino de 19 anos que desenvolveu melanoma maligno do sistema nervoso central.