[Sickle cell disease: A diagnosis to keep in mind].

Sickle cell disease (SCD) is an autosomal recessive genetic disorder. It is the most frequent structural hemoglobinopathy worldwide, and it is produced by an alteration in the globin chain genes. In Chile, there is no data on the prevalence of SCD since it is considered a very rare condition.

[Reversible posterior leukoencephalopathy syndrome in patients with immunosuppressive treatment: report of four cases].

Reversible posterior leukoencephalopathy syndrome (PLS) is characterized by headache, clouding of sensorium, visual disturbances and seizures. It is associated to hypertension, renal disease or immunosuppressive therapy. We report three males, aged 9, 12 and 16 years and one female, aged 5 years wih PLS associated to immunosuppressive therapy.

[Disseminated and fatal adenovirus infection in an immunocompromised child].

Severe adenovirus (ADV) infections have become increasingly important in immunocompromised patients, mainly in pediatric stem cell transplant recipients. We report a case of disseminated ADV infection leading to death in a 12-year-old stem cell transplant recipient. The diagnosis was confirmed by viral isolation and viral genome detection in tissues and blood.

[Treatment of acquired severe aplastic anemia in pediatric patients with immunosuppression and allogeneic stem cell hematopoietic transplant].

Background: Severe acquired aplastic anemia (SAA) is an uncommon disease of childhood. Patients with SAA receive supportive care with transfusions and timely treatment of opportunistic infections, along with specific therapies, which may be allogenic stem cell transplantation (SCT) from a matched sibling or immunosuppressive therapy (IT).

Aim: To report the experience in the management of SAA.

[Hematopoietic stem cell transplantation for patients with Wiskott-Aldrich syndrome].

Background: Wiskott-Aldrich syndrome (WAS) is an X linked congenital disease that presents as eczema, thrombocytopenia and immune deficiency. The only curative procedure for this illness is hematopoietic stem cell transplant (HSCT), preferably from a healthy HLA identical sibling donor. Cord blood is becoming an excellent alternative as stem cell source from unrelated donors.