[The voluminous primitive psoas abscess in children: report of three cases]

The primitive psoas abscess is a pathology extremely rare in the child. The diagnosis is difficult and often delayed. Their treatment requires a local and general sterilization of the infection. We report three observations of primary abscess of the psoas in the child. The clinic presentation is uncommon. Ultrasonography keeps an important place. The biology objective an infectious and inflammatory syndrome. Histology permits to put in evidence all shapes association of lesions. The bacteriological survey of the pus after drainage is only positive in one case. Surgical drainage with bactericidal antibiotherapy permit a definitive recovery.