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The youngest female patient had bilateral tumors and a past history of tuberous sclerosis. The morphologic findings were in accordance with the literature. Macroscopically, the tumors were nonencapsulated disclosing solid, macrocystic and\/or microcystic arrangement. In the largest tumor the arrangement was purely solid with frequent and extensive necrosis. The characteristic and distinctive morphologic feature of the tumors was the \u201cstippling.\u201d The tumoral cells disclosed abundant eosinophilic cytoplasm, containing characteristically thin or coarse basophilic or purple granules. Not rarely, the granules were surrounded by a clear halo imparting a \u201cleishmania-like\u201d aspect which is an additional frequent feature of ESC RCC. A novel morphologic finding of ESC RCC in our series was the presence of \u201ccell cannibalism\u201d in the largest tumor and with extensive necrosis. \u201cCell cannibalism\u201d may be associated with aggressiveness of the tumor cells. All 4 patients are alive and without tumor progression, but the follow-up of our series was short.<\/jats:p>","DOI":"10.1177\/10668969251382815","type":"journal-article","created":{"date-parts":[[2025,11,14]],"date-time":"2025-11-14T17:12:26Z","timestamp":1763140346000},"page":"724-734","update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":0,"title":["Eosinophilic Solid and Cystic Renal Cell Carcinoma (ESC RCC): Clinicopathologic Study of a Series of 4 Patients from Brazil With Report of Cell Cannibalism as a Novel Microscopic Finding"],"prefix":"10.1177","volume":"34","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-8579-3796","authenticated-orcid":false,"given":"Athanase","family":"Billis","sequence":"first","affiliation":[{"name":"State University of Campinas (Unicamp)"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ana P. 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