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‘Hybrid’ oncocytoma: collecting duct (Bellini) carcinoma—the peril from this extremely rare intratumoural coexistence
  1. Ioannis Tsikopoulos1,
  2. Dimitrios Ioannis Papadopoulos2,
  3. Konstantinos Charitopoulos2 and
  4. Chrysovalantis Gkekas1
  1. 1Urology Department, 424 General Military Training Hospital, Thessaloniki, Greece
  2. 2Urology Department, Surgical Division, West Middlesex University Hospital, Isleworth, UK
  1. Correspondence to Dr Dimitrios Ioannis Papadopoulos; dimitrios.papadopoulos{at}


We presented an extremely rare entity of ‘hybrid’ oncocytoma and collecting duct (Bellini) carcinoma. The intratumoural coexistence of benign and malignant cells may lead to false diagnosis and suboptimal treatment of an aggressive tumour. Diagnosis may be challenging if only based on imaging modalities. Even the established value of targeted renal biopsy may be questioned in such scarce cases. Consequently, active surveillance for small renal tumours shall not considered a widely safe management.

  • cancer intervention
  • urological cancer
  • radiology
  • urological surgery

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  • Contributors IT and DIP were involved in data aquisition, manuscript drafting and preparation. KC and CG provided with intellectual input and approved the final manuscript.

  • Funding The authors have not declared a specific grant for this research from any funding agency in the public, commercial or not-for-profit sectors.

  • Competing interests None declared.

  • Provenance and peer review Not commissioned; externally peer reviewed.

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