fa هماتولوژی Hematology گزارش مورد case report <div style="border:double windowtext 1.5pt; padding:1.0pt 4.0pt 1.0pt 0cm"><span style="font-size:11pt"><span style="line-height:normal"><span sans-serif="" style="font-family:Calibri,"><span style="font-size:10.0pt"><span new="" roman="" style="font-family:" times="">Wilms tumor (WT) is the most common malignant tumor (neoplasm) of the urinary tract in early childhood. The median age at WT diagnosis is 3-4 years, and 90% of cases are diagnosed before the age of 7 years. In this report, three adolescent patients with WT, aged 12, 17 and 16, are investigated. Left kidney involvement was observed in these three cases. The clinical presentation in case one was the complaint of abdominal pain with a palpable abdominal mass. The second case was presented with hematuria and an abdominal mass. The clinical symptoms in case three included left flank pain and weight loss. Although WT is usually observed in children under 7 years of age, its diagnosis should also be expected in older children with abdominal pain, palpable mass and gross hematuria.</span></span></span></span></span></div> Child, Neoplasm, Wilms tumor 164 169 http://ijpho.ssu.ac.ir/browse.php?a_code=A-10-1104-2&slc_lang=fa&sid=1 Athena Modanlou No Clinical Research Development Unit of Amirkola Children's Hospital, Babol University of Medical Sciences, Babol, IR Iran. Clinical Research Development Unit of Amirkola Children's Hospital, Babol University of Medical Sciences, Babol, IR Iran. Ahmad Tamaddoni 0000-0002-3684-8754 Yes Non-Communicable Pediatric Diseases Research Center, Health Research Institute, Babol University of Medical Sciences, Babol, IR Iran. Non-Communicable Pediatric Diseases Research Center, Health Research Institute, Babol University of Medical Sciences, Babol, IR Iran. Hassan Mahmoodi Nesheli No Clinical Research Development Unit of Amirkola Children's Hospital, Babol University of Medical Sciences, Babol, IR Iran. Clinical Research Development Unit of Amirkola Children's Hospital, Babol University of Medical Sciences, Babol, IR Iran. Sahar Sadr Moharerpour No Clinical Research Development Unit of Amirkola Children's Hospital, Babol University of Medical Sciences, Babol, IR Iran. Clinical Research Development Unit of Amirkola Children's Hospital, Babol University of Medical Sciences, Babol, IR Iran.