Difference between revisions of "TFE3-rearranged renal cell carcinoma"

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'''Renal tumour with Xp11.2 translocation''', also '''Xp11.2 translocation carcinoma''', is an uncommon [[malignant]] [[kidney tumour]].
'''Renal tumour with Xp11.2 translocation''', also '''Xp11.2 translocation carcinoma''', is an uncommon [[malignant]] [[kidney tumour]].
It should '''not''' be confused with ''[[renal tumour with t(6;11) translocation]]'' (also known as ''TFEB RCC''), another [[translocation carcinoma]]s found in kidney.


==General==
==General==

Revision as of 05:04, 8 August 2015

TFE3-rearranged renal cell carcinoma
Diagnosis in short

Xp11.2 translocation carcinoma. H&E stain.
LM large cells with clear or eosinophilic cytoplasm, calcification (classic histomorphologic feature), +/-papillae, +/-nests, +/-psammoma bodies (common), +/-hyaline bodies (common)
LM DDx clear cell renal cell carcinoma, papillary renal cell carcinoma, epithelioid angiomyolipoma, clear cell papillary renal cell carcinoma, unclassified renal cell carcinoma
IHC TFE3 +ve (nucleus), CD10 +ve, vimentin +ve, CK7 -ve (usu.)
Molecular translocation involving TFE3, e.g. t(X;1)(p11.2;q21)
Grossing notes total nephrectomy for tumour grossing, partial nephrectomy grossing
Site kidney - see kidney tumours
Prevalence rare
Prognosis poor
Clin. DDx other kidney tumours

Renal tumour with Xp11.2 translocation, also Xp11.2 translocation carcinoma, is an uncommon malignant kidney tumour.

It should not be confused with renal tumour with t(6;11) translocation (also known as TFEB RCC), another translocation carcinomas found in kidney.

General

  • Defined by the presence of a fusion gene formed with TFE3 @ Xp11.2.
  • TFE3 is the gene involved in the translocation seen in alveolar soft part sarcoma (ASPS).
  • Poor prognosis - majority Stage III or Stage IV.[1]
  • ~1/3 of childhood RCC.[2]

Microscopic

Features:[3]

  • Large cells.
  • Clear or eosinophilic cytoplasm.
  • Papillae or nests.
  • Psammoma bodies - common.[4]
    • Calcification is considered the classic histomorphologic feature.
  • Hyaline bodies - common.

Notes:

DDx:

Images

Case 1

  • Xp11.2 translocation RCC - intermed. mag. (WC/Nephron)

  • Xp11.2 translocation RCC - high mag. (WC/Nephron)

  • Xp11.2 translocation RCC - very high mag. (WC/Nephron)

Case 2

  • TCK - low mag.

  • TCK - intermed. mag.

  • TCK - high mag.

  • TCK - high mag.

  • TCK - very high mag.

www

IHC

Key stains - as per ISUP:[5]

  • TFE3 +ve (nucleus).[3]
  • TFEB +ve.
  • Cathepsin K +ve.[6]

Others:

  • CD10 +ve.
  • Vimentin +ve.
  • CK7 -ve.
    • Positive in ~20% of cases.[7]
  • HMB-45 & Melan A -ve.
  • EMA usually -ve.[8]
  • CD117 -ve (0 +ve/21 cases[8]).
  • CK (pooled) -ve.[8] (???)
  • WT1 -ve (0 +ve/21 cases[8]).

Notes:

  • Poor man's panel - if one doesn't have the more informative stains:
    • CK (pooled), EMA, Melan A, HMB-45, CK7, AMACR, CD10, vimentin.

Molecular

The most common are:[9]

See also

References

  1. ↑ Su, HH.; Sung, MT.; Chiang, PH.; Cheng, YT.; Chen, YT. (Aug 2014). "The preliminary experiences of translocation renal cell carcinoma and literature review.". Kaohsiung J Med Sci 30 (8): 402-8. doi:10.1016/j.kjms.2014.03.003. PMID 25002378.
  2. ↑ Argani, P.; Olgac, S.; Tickoo, SK.; Goldfischer, M.; Moch, H.; Chan, DY.; Eble, JN.; Bonsib, SM. et al. (Aug 2007). "Xp11 translocation renal cell carcinoma in adults: expanded clinical, pathologic, and genetic spectrum.". Am J Surg Pathol 31 (8): 1149-60. doi:10.1097/PAS.0b013e318031ffff. PMID 17667536.
  3. ↑ 3.0 3.1 3.2 Humphrey, Peter A; Dehner, Louis P; Pfeifer, John D (2008). The Washington Manual of Surgical Pathology (1st ed.). Lippincott Williams & Wilkins. pp. 285. ISBN 978-0781765275.
  4. ↑ Prasad, SR.; Humphrey, PA.; Catena, JR.; Narra, VR.; Srigley, JR.; Cortez, AD.; Dalrymple, NC.; Chintapalli, KN.. "Common and uncommon histologic subtypes of renal cell carcinoma: imaging spectrum with pathologic correlation.". Radiographics 26 (6): 1795-806; discussion 1806-10. doi:10.1148/rg.266065010. PMID 17102051.
  5. ↑ Amin MB, Epstein JI, Ulbright TM, et al. (August 2014). "Best practices recommendations in the application of immunohistochemistry in urologic pathology: report from the international society of urological pathology consensus conference". Am. J. Surg. Pathol. 38 (8): 1017–22. doi:10.1097/PAS.0000000000000254. PMID 25025364.
  6. ↑ Martignoni G, Gobbo S, Camparo P, et al. (October 2011). "Differential expression of cathepsin K in neoplasms harboring TFE3 gene fusions". Mod. Pathol. 24 (10): 1313–9. doi:10.1038/modpathol.2011.93. PMID 21602817.
  7. ↑ He, H.; Zhou, GX.; Zhou, M.; Chen, L. (Sep 2011). "The distinction of clear cell carcinoma of the female genital tract, clear cell renal cell carcinoma, and translocation-associated renal cell carcinoma: an immunohistochemical study using tissue microarray.". Int J Gynecol Pathol 30 (5): 425-30. doi:10.1097/PGP.0b013e318214dd4f. PMID 21804394.
  8. ↑ 8.0 8.1 8.2 8.3 Argani, P.; Hicks, J.; De Marzo, AM.; Albadine, R.; Illei, PB.; Ladanyi, M.; Reuter, VE.; Netto, GJ. (Sep 2010). "Xp11 translocation renal cell carcinoma (RCC): extended immunohistochemical profile emphasizing novel RCC markers.". Am J Surg Pathol 34 (9): 1295-303. doi:10.1097/PAS.0b013e3181e8ce5b. PMID 20679884.
  9. ↑ Ellis, CL.; Eble, JN.; Subhawong, AP.; Martignoni, G.; Zhong, M.; Ladanyi, M.; Epstein, JI.; Netto, GJ. et al. (Dec 2013). "Clinical heterogeneity of Xp11 translocation renal cell carcinoma: impact of fusion subtype, age, and stage.". Mod Pathol. doi:10.1038/modpathol.2013.208. PMID 24309327.
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