Invasive urothelial carcinoma within a calyceal diverticulum associated with renal stones: A case report

Nakano,Taito; Kitagawa,Yasuhide; Izumi,Kouji; Ikeda,Hiroko; Namiki,Mikio

doi:10.3892/ol.2015.3590

Invasive urothelial carcinoma within a calyceal diverticulum associated with renal stones: A case report

Authors:
- Taito Nakano
- Yasuhide Kitagawa
- Kouji Izumi
- Hiroko Ikeda
- Mikio Namiki
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Affiliations: Department of Integrative Cancer Therapy and Urology, Graduate School of Medical Science, Kanazawa University, Kanazawa, Ishikawa 920‑8640, Japan, Division of Pathology, Kanazawa University Hospital, Kanazawa University, Kanazawa, Ishikawa 920‑8641, Japan
Published online on: August 11, 2015 https://doi.org/10.3892/ol.2015.3590
Pages: 2439-2441

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Abstract

Calyceal diverticula are rare outpouchings of the upper collecting system lying within the renal parenchyma. These often contain stones, however, carcinoma within a calyceal diverticulum is uncommon. The present study reports a case of invasive urothelial carcinoma within a calyceal diverticulum associated with renal stones. A 70‑year‑old male with a left renal mass identified by abdominal computed tomography was referred to the Department of Urology, Kanazawa University Hospital. Pre‑operative diagnosis was difficult owing to an atypical imaging finding of a hypovascular renal mass with calcification. A laparoscopic nephroureterectomy was performed, and the surgical specimens showed invasive high‑grade urothelial carcinoma within a calyceal diverticulum, and the calcifications were renal stones consisting of 97% calcium oxalate. Urothelial carcinoma in calyceal diverticula is a rare condition, however, a pre‑operative definite diagnosis is difficult and a high potential for invasion of the renal parenchyma is suspected in this disease.

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