Collision tumor of spindle cell lipoma arising from perirenal tissue and acquired cystic disease‐associated renal cell carcinoma: A rare case report

Introduction Collision tumors are a rare phenomenon defined as two or more histologically distinct tumors that are in contact with each other. Case presentation The patient was a man with a history of end‐stage diabetic nephropathy under hemodialysis treatment for 15 years. A plain computed tomograp...

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Main Authors: Yasuyuki Sakai, Kensuke Oikawa, Masanori Matsukawa
Format: Article
Language:English
Published: Wiley 2023-09-01
Series:IJU Case Reports
Subjects:
Online Access:https://doi.org/10.1002/iju5.12617
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author Yasuyuki Sakai
Kensuke Oikawa
Masanori Matsukawa
author_facet Yasuyuki Sakai
Kensuke Oikawa
Masanori Matsukawa
author_sort Yasuyuki Sakai
collection DOAJ
description Introduction Collision tumors are a rare phenomenon defined as two or more histologically distinct tumors that are in contact with each other. Case presentation The patient was a man with a history of end‐stage diabetic nephropathy under hemodialysis treatment for 15 years. A plain computed tomography scan showed a 4.3 cm mass with obscured margins in the right perirenal fat of the lower pole kidney. On T2‐weighted magnetic resonance imaging, the lesion showed heterogeneous signal intensity with a partially cystic component. A radical nephrectomy was performed. Histopathological and immunohistochemical examination revealed collision tumors constituted of a spindle cell lipoma covering the kidney surface underneath the perirenal fat and diffusely distributed acquired cystic disease‐associated renal cell carcinoma in the renal parenchyma. Conclusion We report the first case of collision tumors comprising spindle cell lipoma and acquired cystic disease‐associated renal cell carcinoma.
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spelling doaj.art-c7b89689cf2749eb9f786f33f71108962023-09-04T00:11:48ZengWileyIJU Case Reports2577-171X2023-09-016531431710.1002/iju5.12617Collision tumor of spindle cell lipoma arising from perirenal tissue and acquired cystic disease‐associated renal cell carcinoma: A rare case reportYasuyuki Sakai0Kensuke Oikawa1Masanori Matsukawa2Department of Urology Takikawa Municipal Hospital Takikawa Hokkaido JapanDivision of Pathology, Department of Nursing Asahikawa Medical University Hospital Asahikawa Hokkaido JapanDepartment of Urology Takikawa Municipal Hospital Takikawa Hokkaido JapanIntroduction Collision tumors are a rare phenomenon defined as two or more histologically distinct tumors that are in contact with each other. Case presentation The patient was a man with a history of end‐stage diabetic nephropathy under hemodialysis treatment for 15 years. A plain computed tomography scan showed a 4.3 cm mass with obscured margins in the right perirenal fat of the lower pole kidney. On T2‐weighted magnetic resonance imaging, the lesion showed heterogeneous signal intensity with a partially cystic component. A radical nephrectomy was performed. Histopathological and immunohistochemical examination revealed collision tumors constituted of a spindle cell lipoma covering the kidney surface underneath the perirenal fat and diffusely distributed acquired cystic disease‐associated renal cell carcinoma in the renal parenchyma. Conclusion We report the first case of collision tumors comprising spindle cell lipoma and acquired cystic disease‐associated renal cell carcinoma.https://doi.org/10.1002/iju5.12617acquired cystic disease‐associated renal cell carcinomacollision tumorkidneyspindle cell lipoma
spellingShingle Yasuyuki Sakai
Kensuke Oikawa
Masanori Matsukawa
Collision tumor of spindle cell lipoma arising from perirenal tissue and acquired cystic disease‐associated renal cell carcinoma: A rare case report
IJU Case Reports
acquired cystic disease‐associated renal cell carcinoma
collision tumor
kidney
spindle cell lipoma
title Collision tumor of spindle cell lipoma arising from perirenal tissue and acquired cystic disease‐associated renal cell carcinoma: A rare case report
title_full Collision tumor of spindle cell lipoma arising from perirenal tissue and acquired cystic disease‐associated renal cell carcinoma: A rare case report
title_fullStr Collision tumor of spindle cell lipoma arising from perirenal tissue and acquired cystic disease‐associated renal cell carcinoma: A rare case report
title_full_unstemmed Collision tumor of spindle cell lipoma arising from perirenal tissue and acquired cystic disease‐associated renal cell carcinoma: A rare case report
title_short Collision tumor of spindle cell lipoma arising from perirenal tissue and acquired cystic disease‐associated renal cell carcinoma: A rare case report
title_sort collision tumor of spindle cell lipoma arising from perirenal tissue and acquired cystic disease associated renal cell carcinoma a rare case report
topic acquired cystic disease‐associated renal cell carcinoma
collision tumor
kidney
spindle cell lipoma
url https://doi.org/10.1002/iju5.12617
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