Cytological findings in bilateral Wilms tumor

Diabetic Fine needle aspiration cytology (FNAC) can act as a useful and reliable pre-operative procedure in pediatric renal tumors. It is a safe technique that does not upstage the tumor. Primary renal tumors constitute the fourth commonest solid tumors of childhood. Wilms tumor along with neuroblastoma being two most common malignant round cell tumors of abdominal cavity. Here we report 2 years old male child presented with mass in left flank and left lumbar region. Clinicoradiological diagnosis of bilateral Wilms tumor was kept. In view of this diagnosis, CT guided FNAC was done. Cytodiagnosis of Wilms tumor was given. In this case report we discussed the interesting cytological findings of presence of many skeletal muscle fibers with prominent cross striations in Wilms tumor which are not described in FNAC smears of any case in the literature reviewed. So this case is presented here for its rare cytological findings.