[Abscess of obturator internal muscle].

The abscess of obturator internal muscle is a rare disorder. The literature states only sporadic cases. Because of its rarity, the diagnosis is often late. Indeed, the presence of functional disability of the lower limb associated to a made septic syndrome evoke in the first of all, arthritis of the hip. We bring back (report) an observation illustrating the difficulties and the delay diagnosis of an abscess of the obturator internal muscle. It is about a ten year old girl having consulted for a septic syndrome with functional disability of the hip. The patient having been treated (handled) at the beginning for a cold of the hip. Secondarily she was operated for septic arthritis of the hip. The surgical investigation showed it self negative. It is only to the pelvien scanner realized after ten days of hospitalization that the diagnostic of abscess was reserved. The evolution has been favourable after surgical drainage and antibiotherapie.