Disseminated histiocytosis X.Analysis of prognostic factors based on a retrospective study of 50 cases

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Abstract
This work is a retrospective study of 50 cases of DHX, collected over a period of 27 years. 24 children died, 26 are still alive. The prognosis for DHX was neither dependent on age (usually occurring in children under 2 years) nor on histological findings but on the extent of the lesions. It was possible to establish a clinical staging system distinguishing 2 groups. One, where the disease was severe and almost always fatal, often included the combined symptoms of thrombocytopenia, spontaneous anemia, jaundice, hepatosplenomegaly, respiratory insufficiency and absence of osteolytic lesions. The other, with a favorable prognosis, was characterized by skin lesions, diabetes insipidus, exclusively radiological pulmonary involvement and multiple bone lesions. In cases where death did not occur, DHX was often chronic, frequently persisting for 2 years or more and leading to serious sequelae such as diabetes insipidus, growth stunting, intellectual retardation, blindness or deafness.

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