Özet:

Our aim is to present diagnosis of desmoid tumor in a patient with recurrent upper abdominal pain and mass with normal ultrasound findings. Fifteen-years-old boy had been operated due to acute appendicitis and intraabdominal abscess four years ago was admitted to our clinic with complaints of right upper quadrant pain and swelling for two years. Many ultrasound were performed but nothing was found. There was 6 centimeter (cm) thickening and heterogeneity of right rectus abdominis muscle with a suspicious mass neighboring the liver at computed tomography (CT) and magnetic resonance imaging (MRI). He was operated and pathology was reported as desmoid tumor. Even basic studies don’t reveal any pathology if the patient’s complaint goes on surgeon must be aggressive for diagnosis in order not to miss out malignancies.

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