Pancreatoblastoma is a rare pancreatic tumor. In this study, 3 cases of childhood pancreatoblastoma that arise from the tail of the pancreas were reported. Abdominal pain and vomiting were observed in 1 case considering the huge size of the tumor. The other 2 patients, who were previously well, complained of a mass in the abdomen after a casual physical examination. Elevated serum α-fetoprotein levels were noted in all cases. Imaging findings indicated a well-defined heterogeneous large mass in the left retroperitoneal space. Exploratory laparotomy revealed a large mass, arising from the tail of the pancreas. Surgery alone with complete excision of the masses was performed. Immunohistochemical staining showed that only α-fetoprotein was positive in all cases. All of these 3 cases have a good outcome in the follow-up without adjuvant chemotherapy. These data suggest that the diagnosis of pancreatoblastoma is difficult and should be suspected at palpation of an abdominal mass. α-Fetoprotein may serve as a tumor marker for preoperative diagnosis and postoperative recurrence. Pancreatoblastoma arising from the tail of the pancreas is a curable tumor, and adjuvant chemotherapy may not be necessary if the tumor can be excised completely.

Ovarian juvenile granulosa cell tumor (JGCT) is an extremely rare sex cord-stromal tumor that is most commonly encountered in prepubertal girls and young women. In this study, 3 cases of childhood JGCT are reported. The main causes of hospitalization were abnormal abdominal signs and syndromes. Imaging findings indicated masses with multiple cysts and solid components in the abdominal cavities. Diagnosis was confirmed by histopathology. Tumors were excised completely, and all cases have a good outcome in the follow-up (2 to 13 y) without any adjuvant chemotherapy or radiotherapy. This data suggests that children with JGCT might have a variety of initial clinical manifestations. Pathologic examination especially immunohistochemical staining could help to diagnose JGCT. For children, adjuvant treatment may not be necessary if the tumor can be excised completely in early stage.

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