Leishmaniasis and autoimmune diseases in pediatric age.

Leishmaniasis is a group of diseases caused by the protozoa Leishmania, endemic in the Mediterranean countries. Clinical manifestations can be divided into three different forms: cutaneous leishmaniasis, mucosal leishmaniasis and the visceral leishmaniasis, the most severe form which is potentially lethal if untreated. Immunology and pathogenesis are complex: many different aspects of immune response, resistance and susceptibility to Leishmania have been studied but many others remain to be clarified. The gold standard in diagnosis of visceral Leishmaniasis is the presence of amastigotes in bone marrow or tissue sections. Patients can be initially misdiagnosed as having an autoimmune disease because it may mimic diseases like systemic lupus erythematosus, autoimmune hepatitis, dermatomyositis or others disorders. As in pediatric age the risk of life-threatening complications is very high, leishmaniasis, must be kept in mind to the clinician, in order to avoid wrong diagnosis and an inappropriate immunosuppressive therapy.