PMID: 18194599Jan 16, 2008Paper

Clinicopathologic and prognostic study of pediatric immature teratoma

Zhonghua bing li xue za zhi Chinese journal of pathology
Wen-ping YangXiao-jun Xiong

Abstract

To study the clinicopathologic features and biologic behavior of pediatric immature teratoma. The clinical data, pathologic features, immunohistochemical findings (for cyclin D1, P27 and Ki-67) and follow-up information of 39 cases of pediatric immature teratoma were analyzed. Amongst the 39 cases studied, 12 arose in the sacrococcygeal region, 12 in testis, 5 in retroperitoneum, 4 in ovary, 4 in abdomen and 2 in mediastinum. Histologically, 16 cases were of grade 1, 8 cases of grade 2 and 15 cases of grade 3. Seven of the cases contained foci of yolk sac tumor. Immature neuroepithelial features used in histologic grading included the presence of primitive neural tubules, immature rosettes, undifferentiated neuroblastoma cells and primitive neuroectodermal structures. Immunohistochemical study showed that cyclin D1 was positive in 3 cases of grade 1 tumors, 4 cases of grade 2 tumors and 9 cases of grade 3 tumors. The positivity rates for p27 were 8, 3 and 6 cases respectively, while those for Ki-67 were 3, 4 and 13 cases respectively. Follow-up data were available in 30 cases. Three of them, including 2 cases with histologic grade 3 (with or without yolk sac tumor component), recurred after operation. The expression of cyclin D...Continue Reading

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