Fig. 4From: Clinicopathological features of primary thyroid Burkitt’s lymphoma: a systematic review and meta-analysisLeft: Epstein-Barr virus-encoded small RNA (EBER) in situ hybridization of thyroid Burkitt’s lymphoma. The tumor cells are negative for Epstein-Barr virus (EBV) (×200). Right: EBER in situ hybridization of nasopharyngeal carcinoma, which was used as external positive control. The tumor cells are positive for EBV (× 200)Back to article page