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Renal Epithelioid Angiomyolipoma with Epithelial Cysts Mimicking Cystic Renal Cell Carcinoma: A Case Report of Combination of Two Rare Entities

상피낭종을 동반한 신장의 상피모양 혈관근지방종: 두 희귀 질환의 조합에 대한 증례 보고

  • Sang Hoon Lee (Department of Radiology, Jeju National University Hospital, Jeju National University College of Medicine) ;
  • Jeong Sub Lee (Department of Radiology, Jeju National University Hospital, Jeju National University College of Medicine) ;
  • Jeong Jae Kim (Department of Radiology, Jeju National University Hospital, Jeju National University College of Medicine) ;
  • Su Yeon Ko (Department of Radiology, Jeju National University Hospital, Jeju National University College of Medicine) ;
  • Kyung Ryeol Lee (Department of Radiology, Jeju National University Hospital, Jeju National University College of Medicine) ;
  • Im Kyung Hwang (Department of Radiology, Jeju National University Hospital, Jeju National University College of Medicine) ;
  • Chang Lim Hyun (Department of Pathology, Jeju National University Hospital, Jeju National University College of Medicine)
  • 이상훈 (제주대학교 의과대학 제주대학교병원 영상의학과) ;
  • 이정섭 (제주대학교 의과대학 제주대학교병원 영상의학과) ;
  • 김정재 (제주대학교 의과대학 제주대학교병원 영상의학과) ;
  • 고수연 (제주대학교 의과대학 제주대학교병원 영상의학과) ;
  • 이경렬 (제주대학교 의과대학 제주대학교병원 영상의학과) ;
  • 황임경 (제주대학교 의과대학 제주대학교병원 영상의학과) ;
  • 현창림 (제주대학교 의과대학 제주대학교병원 병리과)
  • Received : 2021.10.28
  • Accepted : 2022.01.27
  • Published : 2022.09.01

Abstract

Renal angiomyolipomas (AMLs) are typically solid tumors, but there have been few reports of a rare cystic variant of AML. AML with epithelial cysts, where the epithelial cyst has a cuboidal epithelial lining, account for the majority of them. Next, epithelioid AML (EAML) with cystic changes due to hemorrhage and necrosis, which is composed of epithelioid cells with abundant eosinophilic cytoplasm, have also been reported. These rare cystic types of AML can be mistaken for other cystic tumors, such as cystic renal cell carcinoma, in preoperative imaging. We report the imaging findings of a rare case of EAML with epithelial cysts.

신장의 혈관근지방종은 전형적으로 고형 종괴지만, 낭성 형태의 신장 혈관근지방종이 소수 보고되었다. 그중에서 대다수의 보고는 상피낭종을 동반한 혈관근지방종으로 입방상피조직으로 둘러싸인 낭종을 포함한다. 다음으로 상피모양 혈관근지방종은 호산성 세포질이 풍부한 상피모양세포를 포함하는데, 이것이 출혈이나 괴사로 인해 낭성변화를 일으킨 증례 보고도 있었다. 이런 낭성 형태의 신장 혈관근지방종은 영상검사에서 낭성 신세포암 등의 다른 낭성 종괴로 오인될 수 있다. 이 증례 보고에서는 58세 남성에서 발견된 상피낭종을 동반한 상피모양 혈관근지방종의 영상 소견을 살펴보려고 한다.

Keywords

References

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