Girl 6 yo, recurrent abdominal pain. Ultrasound detected one ovoid mass at the head of pancreas with size of 3x5cm, solid and well-bordered. In relation with right renal hilus, this mass was expanding renal artery and vein. Echo structure this mass was inhomogeneous, microcalcification and hypovascular supplying. MSCT with CE: clear borders and well located this mass. Blood tests were normal. Pre-operation there were 3 suggestions of diagnosis, as retroperitoneal tumor, adrenal gland tumor and pancreatic tumor of processus uncinatus. This case was operated for removing this tumor easily. It had appearance of a head of medusa. The tumor structure was in red color liked bone marrow tissue.