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Abstract | Full HTML Article | PDF | Spanish ecancer 10 693 / https://doi.org/10.3332/ecancer.2016.693

Case Report

Hepatic metastasis of thymoma: case report and immunohistochemical study

Thymomas are rare tumours characterised by their slow growth and capacity to invade directly by contiguity. While distant dissemination is infrequent, all sub-types of thymoma have the capacity to metastasise to extrathoracic organs.

We present here the case of a female patient with a liver mass discovered 13 years after the removal of a mediastinal thymoma and after ten years from thyroidectomy for papillary carcinoma.

The histopathological study showed that the lesion contained an epithelial component, which was immunohistochemically positive for pankeratin. It was accompanied by numerous small lymphocytes testing positive for TdT, CD3, CD4, CD5, CD8, CD99, and CD43. The result was consistent with hepatic metastatic thymoma sub-type B1, according to the World Health Organisation classification (WHO).

Our case highlights the importance of morphological and immunohistological examinations in the differential diagnosis of visceral masses in patients with a history of thymoma. Given the infrequency of its metastasis and the increased risk of developing other primary tumours that these patients have, these studies play a significant role.

Keywords: thymoma, metastasis of thymoma, hepatic metastasis

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