Succinate dehydrogenase-deficient renal cell carcinoma

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Succinate dehydrogenase-deficient renal cell carcinoma
Diagnosis in short

SDH-deficient renal cell carcinoma. H&E stain.
LM eosinophilic cells with clear (flocculent) cytoplasmic inclusions, round nuclei with mildly granular chromatin pattern, intratumoural mast cells, solid architecture
LM DDx renal oncocytoma, chromophobe renal cell carcinoma, clear cell renal cell carcinoma, ther renal tumours with eosinophilic cytoplasm
Stains SDHB -ve, CK7 -ve, CD117 -ve, PAX8 +ve
Gross mass lesion, commonly cystic
Site kidney - see kidney tumours
Prevalence extremely rare
Prognosis usually good prognosis (limited data)
Clin. DDx other kidney tumours

Succinate dehydrogenase-deficient renal cell carcinoma, also succinate dehydrogenase renal cell carcinoma (abbreviated SDH-RCC), is a very rare type of renal cell carcinoma.

It is grouped in the emerging entities of the Vancouver modification of the 2004 WHO classification of renal neoplasia.[1]

General

  • Extremely rare - only approximately 10 cases described as of 2012.[1]
  • May be assocated with paraganglioma and familial (as with several SDH mutations).[2]
  • Primarily described with a SDHB mutation.[3]
    • SDHA has been described.[3]
    • SDHC has been described.[4]
    • SDHD has been described.Cite error: Invalid <ref> tag; invalid names, e.g. too many
  • SDH-deficient RCC (nature.com).[3]

Case 1

  • SDH-RCC low mag.

  • SDH-RCC intermed. mag.

  • SDH-RCC intermed. mag.

  • SDH-RCC high mag.

  • SDH-RCC very high mag.

Case 2

  • SDH-RCC intermed. mag.

  • SDH-RCC high mag.

  • SDH-RCC very high mag.

IHC

Features:

  • SDHB -ve (11 of 11 cases[3]).
    • Normal tubules +ve.
    • May be (pseudo)negative in clear cells (as few mitochondria).
  • CD117 -ve - important.

Others:

  • PAX8 +ve.
  • CK7 -ve (1/35).

See also

References

  1. ↑ 1.0 1.1 Srigley, JR.; Delahunt, B.; Eble, JN.; Egevad, L.; Epstein, JI.; Grignon, D.; Hes, O.; Moch, H. et al. (Oct 2013). "The International Society of Urological Pathology (ISUP) Vancouver Classification of Renal Neoplasia.". Am J Surg Pathol 37 (10): 1469-89. doi:10.1097/PAS.0b013e318299f2d1. PMID 24025519.
  2. ↑ Cite error: Invalid <ref> tag; no text was provided for refs named pmid25800244
  3. ↑ 3.0 3.1 3.2 3.3 Williamson, SR.; Eble, JN.; Amin, MB.; Gupta, NS.; Smith, SC.; Sholl, LM.; Montironi, R.; Hirsch, MS. et al. (Jan 2015). "Succinate dehydrogenase-deficient renal cell carcinoma: detailed characterization of 11 tumors defining a unique subtype of renal cell carcinoma.". Mod Pathol 28 (1): 80-94. doi:10.1038/modpathol.2014.86. PMID 25034258. Cite error: Invalid <ref> tag; name "pmid25034258" defined multiple times with different content
  4. ↑ Cite error: Invalid <ref> tag; no text was provided for refs named pmid23083876
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