[Angioedema as initial manifestation of hypogammaglobulinemia].

Common variable immunodeficiency is characterized by hypogammaglobulinemia and the inability to respond to vaccines. Patients mostly manifest infections, however only less than 5 % have pathological conditions as autoimmunity, granulomatous inflammation, and splenomegaly or lymphoproliferative disease among others, without showing infections. We report the case of a woman who debuted with localized cutaneous affection, facial angioedema, without other early symptoms.

[Clinical-epidemiological profile of oral allergy syndrome in the population aged 6 to 18 years].

Background: Oral allergy syndrome (OAS) or pollen-fruit syndrome is a type of food allergy. Its characteristics and associated allergens vary according to the studied population. There are few studies in Mexico about this topic, none in children.

[Guía latinoamericana para el diagnóstico y tratamiento de alergia a las proteínas de la leche de vaca (GL-APLV)].

Cow's milk allergy (CMA) is an immune-based disease that has become an increasing problem. The diagnosis and management of CMA varies from one clinical setting to another and represents a challenge in pediatric practice. In addition, because nonallergic food reactions can be confused with CMA symptoms, there is an overdiagnosis of the disease.

[Etoposide desensitization. A case report].

All chemotherapeutic agents have the potential to induce hypersensitivity reactions and the repeated administration of such drugs during a cancer treatment enhances specific sensitization. Epipodophyllotoxins (etoposide and teniposide) are commonly used to treat lung, testicular, central nervous system and hematologic cancers. Hypersensitivity reactions to epipodophyllotoxins are not the most common but they have been reported.

[Risk factors related to allergic diseases at Mexico City].

Background: Several studies suggest that the prevalence of allergic diseases has been increasing worldwide in recent years; then it is very important to identify some risk factors that could be related.

Objective: To know some hereditary and environmental risk factors that could be related to the development of allergic diseases in open population from Mexico City.

Patients And Method: It was an open-population, cross-sectional trial, in two phases with a random sample size of 4272 individuals in 214 public health centers.

[Prevalence of allergic diseases in Mexico City].

Background: There is a considerable variation in the prevalence of allergic disorders in developing countries. These differences may be attributable to different methodological problems and to the lack of operational definitions. Several studies suggest that the prevalence of allergic diseases has been increasing worldwide in recent years.

Central nervous system involvement in a child with polyarteritis nodosa and severe atopic dermatitis.

Polyarteritis nodosa is a diffuse vasculitis of small- and medium-sized muscular arteries that can involve the vessels of one or several organ systems. We report an 11-year-old boy with severe atopic dermatitis further complicated with erythroderma and cerebellar symptoms. Laboratory studies showed negative antinuclear antibodies and antineutrophil cytoplasmic antibodies; increased serum complement, IgG cryoglobulins 96.