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. 2014 Nov 26;9:181. doi: 10.1186/s13023-014-0181-x

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© Silveira et al.; licensee BioMed Central Ltd. 2014

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

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Identical twins diagnosed with different subtypes of testicular germ cell tumors. A) Embryonal carcinoma. B) Embryonal carcinoma in detail, showing a papillary growth pattern. C) Seminoma nodule within the testis D) Seminoma in detail, showing large round cells with lymphocytes.