25 The Trapped Twin Within: A Rare Case Report of Fetus in Fetu

Abstract Introduction Fetus in fetu is an uncommon congenital anomaly which the malformed monochorionic diamniotic twin entrapped within body of host twin, due to embryogenic defects or arrest blood supply. Differentiation from teratomas done by evidence budding vertebral column and limbs radiological investigations. has incidence 1 500,000 births with less than 200 cases reported. Herein,we present a case year old male infant brought growing abdominal mass. Case report A 12-month-old child was mother mass right lower quadrant failure thrive. Tumor markers were negative investigations confirmed huge retroperitoneal 12 *10 cm fetus compressing inferior vena cava. Transverse laparotomy in-toto excision following meticulous dissection done. Histopathology diagnosis fetu. Conclusion Though rare entity, warrants suspicion pediatric lump special focus differentiate teratoma recommended. Surgical curative.