It seems more than reasonable to assume that "cosinofílicos" is a typo, possibly the result of scanning the document. Examples follow.

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Note added at 46 mins (2018-04-15 20:55:24 GMT)
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Note, also, that 'cytoplasm' is a bulk noun (singular) in ENglish, like spaghetti or spinach. You can say 'cytoplasm fragments', but you have to use it with a head noun to make it plural.

https://www.ncbi.nlm.nih.gov/pubmed/10452581
Tumors of the skin composed of large cells with **abundant eosinophilic cytoplasm**. ... Tumors of the skin composed of large epithelioid cells displaying abundant **smooth or granular eosinophilic cytoplasm** are relatively rare, yet may constitute a source of diagnostic difficulties for pathologists.

https://librepathology.org/wiki/Renal_tumours_with_eosinophi...
Jun 13, 2016 - Renal tumours with **eosinophilic cytoplasm**, also eosinophilic renal tumours and kidney tumours with eosinophilic cytoplasm, are relatively common and have a differential diagnosis

https://www.researchgate.net/.../The-individual-tumour-cells...
See figure: 'The individual tumour cells with **pale eosinophilic cytoplasm**, tapering vesicular nuclei, and...'

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Note added at 5 hrs (2018-04-16 01:54:29 GMT)
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Yes, Claudia. These are all microscopic findings.