Parachordoma/myoepithelioma of the kidney: first report of a myxoid mimicry in an unusual location.
We report a case of parachordoma (or myoepithelioma) of the right upper kidney in a 56 year-old male patient. Light microscopic features of the tumor exhibited epithelioid, glomoid, and spindle cells with eosinophilic and vacuolated cytoplasm as well as round to oval nuclei. These cells were embedded in a myxoid and hyaline stroma separated by a fibrous tissue with minimal cellular atypia and a few small nucleoli. Immunohistochemically, the tumor cells were immunoreactive for epithelial membrane antigen, calponin, vimentin, S-100, and type-IV collagen. All kidney and adrenal were resected, and the patient was carefully followed up. During the 11 months follow-up, recurrence and metastases were not observed. To our knowledge, this study is the first to document a case of parachordoma/myoepithelioma of the kidney. We add this new case to existing tumors and discuss its distinction from other types.
Department of Pathology, Shihezi University School of Medicine Shihezi, Xinjiang 832002, P.R. China ; Key Laboratory of Xinjiang Endemic and Ethnic Dipseses, Ministry of Education of China Shihezi, Xinjiang 832002, P.R. China ; Department of Pathology, The Fourth Hospital Affiliated Shihezi University School of Medicine Akesu, Xinjiang 843000, China.
Hai-Xia
HX
Gao
Department of Pathology, Shihezi University School of Medicine Shihezi, Xinjiang 832002, P.R. China ; Key Laboratory of Xinjiang Endemic and Ethnic Dipseses, Ministry of Education of China Shihezi, Xinjiang 832002, P.R. China.
Chun-Xia
CX
Liu
Department of Pathology, Shihezi University School of Medicine Shihezi, Xinjiang 832002, P.R. China ; Key Laboratory of Xinjiang Endemic and Ethnic Dipseses, Ministry of Education of China Shihezi, Xinjiang 832002, P.R. China.
Hong
H
Zou
Department of Pathology, The Fourth Hospital Affiliated Shihezi University School of Medicine Akesu, Xinjiang 843000, China.
Cai-Pu
CP
Chun
Department of Pathology, Shihezi University School of Medicine Shihezi, Xinjiang 832002, P.R. China ; Key Laboratory of Xinjiang Endemic and Ethnic Dipseses, Ministry of Education of China Shihezi, Xinjiang 832002, P.R. China.
Xiaobin
X
Cui
Department of Pathology, Shihezi University School of Medicine Shihezi, Xinjiang 832002, P.R. China ; Key Laboratory of Xinjiang Endemic and Ethnic Dipseses, Ministry of Education of China Shihezi, Xinjiang 832002, P.R. China.
Yunzhao
Y
Chen
Department of Pathology, Shihezi University School of Medicine Shihezi, Xinjiang 832002, P.R. China ; Key Laboratory of Xinjiang Endemic and Ethnic Dipseses, Ministry of Education of China Shihezi, Xinjiang 832002, P.R. China.
Wenjie
W
Zhang
Department of Pathology, Shihezi University School of Medicine Shihezi, Xinjiang 832002, P.R. China ; Key Laboratory of Xinjiang Endemic and Ethnic Dipseses, Ministry of Education of China Shihezi, Xinjiang 832002, P.R. China.
Yan
Y
Qi
Department of Pathology, Shihezi University School of Medicine Shihezi, Xinjiang 832002, P.R. China ; Key Laboratory of Xinjiang Endemic and Ethnic Dipseses, Ministry of Education of China Shihezi, Xinjiang 832002, P.R. China.
Ning
N
Wang
Department of Pathology, Shihezi University School of Medicine Shihezi, Xinjiang 832002, P.R. China ; Key Laboratory of Xinjiang Endemic and Ethnic Dipseses, Ministry of Education of China Shihezi, Xinjiang 832002, P.R. China.
Weihua
W
Liang
Department of Pathology, Shihezi University School of Medicine Shihezi, Xinjiang 832002, P.R. China ; Key Laboratory of Xinjiang Endemic and Ethnic Dipseses, Ministry of Education of China Shihezi, Xinjiang 832002, P.R. China.
Jinfang
J
Jiang
Department of Pathology, Shihezi University School of Medicine Shihezi, Xinjiang 832002, P.R. China ; Key Laboratory of Xinjiang Endemic and Ethnic Dipseses, Ministry of Education of China Shihezi, Xinjiang 832002, P.R. China.
Feng
F
Li
D014408:Biomarkers, Tumor / Q000032:analysis; D006801:Humans; D007150:Immunohistochemistry; D007680:Kidney Neoplasms / Q000378:metabolism / Q000473:pathology*; D008297:Male; D008875:Middle Aged; D009208:Myoepithelioma / Q000378:metabolism / Q000473:pathology*
D014408:Biomarkers, Tumor
Kidney; mixed tumor; myoepithelioma; myxoid; parachordoma