RESUMEN
STUDY DESIGN: A case report. SUMMARY OF LITERATURE REVIEW: The symptoms of psoas abscess are fever, low back pain, and spasm of the psoas muscle. OBJECTIVES: To report a case of psoas and thigh abscess caused by ruptured appendicitis. MATERIALS AND METHODS: A 53- year old male patient visited the complaining of fever, low back pain and thigh pain. Imaging studies revealed psoas abscess and thigh abscess, accompanied by ruptured appendicitis. Therefore, surgical treatment with percutaneous drainage was performed. RESULTS: The patient recovered and returned to his normal life after 2 months. CONCLUSIONS: It is necessary to identify the cause of the infection using physical examination as well as abdominal and pelvis computed tomography when a patient has fever, psoas abscess and thigh abscess. It is also important to be aware that the cause of psoas abscess may also be gastrointestinal tract disease with non specific symptoms.