The authors review a case of a 24-year-old male @entity1 hospitalised for repeated @entity697 . His medical history included no diseases worth of mentioning. By imaging techniques (abdominal US and CT scan) a @entity5409 , measuring 40 x 35 x 30 mm in diameter was found, and was diagnosed as pseudocyst in the region of the tail of the pancreas. Jejunal feeding was introduced. The lesion did not improve and the second CT scan suggested a suspicion of @entity788 . Three months after first presentation the surgical resection was performed. The @entity5 , however, was found independent of the pancreas (90 x 80 x 50 mm). Both histologically and immunohistochemically the lesion proved to be the @entity3 of a germ cell (yolk-sac) @entity5 . Following the morphological diagnosis, detailed urological and medical check up was performed. A previously nonpalpable small @entity5 was found in the left testis which was radically resected. The @entity5 measuring 9 x 9 x 5 mm in diameter was diagnosed as @entity189 . Later on the @entity1 underwent chemotherapy. He has been undergoing close oncological followup. Clinically, he is disease free. Authors emphasize the importance of imaging techniques and fine needle aspiration cytology in the case of retroperitoneal masses in young males. The possibility of a @entity3 , especially of germ cell origin, should be excluded (not only by physical examination, but by ultrasound of testis also) in case of @entity5 even with unusual morphology.

[Pancreas pseudocyst or XXXX ?].

@entity1 :: ('9606', 'Species') :: ['patient'] @entity788 :: ('MESH:D010190', 'Disease') :: ['pancreatic cystadenoma'] @entity697 :: ('MESH:D000208', 'Disease') :: ['acute abdominal symptoms'] @entity5409 :: ('MESH:D052177', 'Disease') :: ['cystic lesion'] @entity5 :: ('MESH:D009369', 'Disease') :: ['testicular tumour', 'retroperitoneal cystic tumours', 'tumour'] @entity189 :: ('MESH:D002277', 'Disease') :: ['embryonal carcinoma'] @entity3 :: ('MESH:D009362', 'Disease') :: ['metastasis']
@entity3 :: (MESH:D009362,Disease) :: ['metastasis']
