[Kostmann disease in children].

Kostmann's disease (KD) is a severe congenital neutropenia, a rare autosomal recessive disorder of neutrophil number. Complete blood count with differential reveals an ANC less than 500/mm3 as seen in classic cases, monocytosis and eosinophilia. Bone marrow aspiration or biopsy reveals an arrest of neutrophil precursor maturation at the promielocyte or myelocyte level.

[Osteopenia in children with juvenile idiopathic arthritis].

Unlabelled: The aim of the study was to evaluate the presence and etiopathogenesis of osteopenia in 41 children with Juvenile Idiopathic Arthritis (JIA).

Methods: Bone status was evaluated by quantitative ultrasound using a Sunlight Omnisense 7000s Ultrasound Bone Sonometer. Measurements were performed at the distal radius and midshaft tibia.