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[Bellini duct carcinoma treated with partial nephrectomy: a case report]

Y Yasunaga1, K Nishimura, H Takatera

  • 1Department of Urology, Osaka Police Hospital.

Hinyokika Kiyo. Acta Urologica Japonica
|December 1, 1994
PubMed
Summary

This case study details a rare Bellini's duct carcinoma diagnosis in a 37-year-old woman presenting with asymptomatic hematuria. Early detection and partial nephrectomy led to a favorable one-year prognosis without metastasis.

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Area of Science:

  • Uro-oncology
  • Renal Pathology

Background:

  • Collecting duct carcinoma (Bellini's duct carcinoma) is an exceptionally rare and aggressive renal malignancy.
  • Early diagnosis is often challenging due to nonspecific symptoms and location.

Observation:

  • A 37-year-old woman presented with asymptomatic hematuria, prompting imaging studies.
  • Imaging revealed filling defects in the right renal pelvis, initially suspected as a renal pelvic tumor.
  • Ureteroscopic biopsy indicated low-grade renal cell carcinoma.

Findings:

  • Histopathological examination of the partial nephrectomy specimen revealed a highly differentiated adenocarcinoma.
  • Immunohistochemical staining confirmed the tumor's origin from distal nephrons, consistent with Bellini's duct carcinoma.
  • The tumor exhibited papillary proliferation alongside collecting duct epithelium.

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Implications:

  • This case highlights the importance of thorough histopathological and immunohistochemical analysis for accurate diagnosis of rare renal tumors.
  • Successful surgical management (partial nephrectomy) can achieve favorable outcomes in select Bellini's duct carcinoma cases.
  • Further research into diagnostic markers and treatment strategies for this rare entity is warranted.