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Fetal Pediatr Pathol. 2013 Jul;32(4):298-307. doi: 10.3109/15513815.2012.754527. Epub 2013 Feb 25.

The immune environment of paediatric solid malignancies: evidence from an immunohistochemical study of clinical cases.

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UCL Institute of Child Health, London, UK.


Childhood malignancies are relatively poorly studied in terms of tumour/host interaction. Using tissue arrays of childhood cancers, we analysed immunohistochemical staining for CD68, CD3 and FOXP3 to evaluate infiltration of myeloid cells, lymphocytes and regulatory T cells. Staining for phosphorylated STAT3 was performed in a subset. The majority of paediatric tumours demonstrated a marked infiltration of CD68+ myeloid cells but, with the exception of neuroblastoma, most showed only sparse infiltration of CD3+/ FOXP3- cells. There was evidence for activation of STAT3 in pPNET (50%), ependymoma (45%) and undifferentiated sarcoma (38%), but it was rarely activated in other tumours.

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