Yali YANG, Youli WU, Yang LAN, et al. Clinicopathological analysis of fumarate hydratase-deficient renal cell carcinoma and literature review[J]. Journal of Third Military Medical University, 2021, 43(18): 1743-1750.
DOI:
Yali YANG, Youli WU, Yang LAN, et al. Clinicopathological analysis of fumarate hydratase-deficient renal cell carcinoma and literature review[J]. Journal of Third Military Medical University, 2021, 43(18): 1743-1750. DOI: 10.16016/j.1000-5404.202103180.
Clinicopathological analysis of fumarate hydratase-deficient renal cell carcinoma and literature review
To investigate the clinicopathological characteristics of fumarate hydratase-deficient renal cell carcinoma (FH-d RCC) so as to further understand this rare tumor.
Methods
2
Two cases with FH-d RCC diagnosed in our hospital from 2010 to 2020 were studied by histopathological observation
immunohistochemical staining (IHC)
fluorescence
in situ
hybridization (FISH) and next generation sequencing (NGS)
respectively. A literature review was also performed.
Results
2
Both patients were males and aged 34 and 35 years respectively. In case 1
the tumor affected bilateral kidneys with renal hilar lymph node metastasis
whose tumor cells displayed papillary and glandular patterns with high-grade morphology. In case 2
the tumor was located in the upper pole of the kidney and afflicted the adrenal gland; the tumor cells in most areas were well differentiated
presenting tubular and cystic arrangement in varying sizes
and were surrounded by focal areas of low differentiation. Eosinophilic viral inclusion-like macronucleoli and perinucleolar halos are observed in some tumor nuclei of both cases. Besides positive staining for epithelial and renal markers by IHC
both tumors showed negative for CK7 and focal positive for CA9 (CK7
-
/CA9
+
). FH expression was absent in case 1 while retained in case 2
but somatic FH gene mutations were detected in both cases by NGS. Moreover
no rearrangement of TFE3 gene was found by FISH.
Conclusion
2
FH-d RCC is a rare high-grade renal cell carcinoma with FH gene mutation
often showing highly aggressive behavior and poor prognosis
whose typical histopathologic features include the papillary arrangement of tumor cells
eosinophilic viral inclusion-like macronucleoli and perinucleolar halos.
关键词
Keywords
references
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