[Gastric trichobezoar in an adolescent presenting with anemia: ultrasound and MRI findings].

Trichobezoars are rare and composed of ingested hair or fibers. Diagnosis is usually made by plain radiographs and barium meal. The usefulness of computed tomography has been reported in the preoperative period. In the pediatric population the authors propose, based on a recent case report, a non invasive and non irradiating protocol using sonography and T1W and T2W MR imaging.