Eosinophilic, solid and cystic renal cell carcinoma

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Eosinophilic, solid and cystic renal cell carcinoma
Diagnosis in short

Eosinophilic, solid and cystic renal cell carcinoma. H&E stain.

LM epithelioid cells with abundant stippled eosinophilic cytoplasm +/- peripheral clearing, round nuclei with prominent nucleoli, nested or solid architecture +/- cystic spaces with hobnail lining cells, +/-scattered histiocytes (common), +/-multi-nucleation (common), +/-small intracytoplasmic globules
LM DDx chromophobe renal cell carcinoma (eosinophilic variant), clear cell renal cell carcinoma, t(6;11) renal cell carcinoma, other renal tumours with eosinophilic cytoplasm
IHC PAX8 +ve, CK20 +ve, CK7 -ve, CA9 -ve, CD117 -ve, HMB-45 -ve
Molecular TSC/mTOR pathway mutations
Gross solid and cystic
Site kidney - see kidney tumours

Clinical history women only
Prevalence rare
Prognosis good - data limited
Clin. DDx other kidney tumours

Eosinophilic, solid and cystic renal cell carcinoma, abbreviated ESC-RCC, is recently described, evolving kidney tumour that is presumed to be malignant.[1]

It is not within the WHO 2016 classification of renal neoplasia.

General

Gross

Features:[1]

  • Tan colour.
  • Solid and usually cystic.

Microscopic

Features:[1]

  • Epithelioid cells with abundant stippled eosinophilic cytoplasm +/- peripheral clearing.
  • Round nuclei with one prominent nucleolus.
  • Nested or solid architecture +/- cystic spaces with hobnail lining cells.
  • +/-Scattered histiocytes (common).
  • +/-Multi-nucleation (common).
  • +/-Small intracytoplasmic globules - usually seen but only present in a handful of cells.

DDx:

Images

Case 1

Case 2

Case 3

Case 4

IHC

Features:[1]

  • PAX8 +ve.
  • CK20 +ve (14/19 cases).[3]
  • CK7 -ve.
  • CD117 -ve.
  • CA9 -ve.
  • HMB-45 -ve.

Molecular

See also

References

  1. 1.0 1.1 1.2 1.3 Trpkov, K.; Hes, O.; Bonert, M.; Lopez, JI.; Bonsib, SM.; Nesi, G.; Comperat, E.; Sibony, M. et al. (Sep 2015). "Eosinophilic, Solid, and Cystic Renal Cell Carcinoma: Clinicopathologic Study of 16 Unique, Sporadic Neoplasms Occurring in Women.". Am J Surg Pathol. doi:10.1097/PAS.0000000000000508. PMID 26414221.
  2. Guo, J.; Tretiakova, MS.; Troxell, ML.; Osunkoya, AO.; Fadare, O.; Sangoi, AR.; Shen, SS.; Lopez-Beltran, A. et al. (Nov 2014). "Tuberous Sclerosis-associated Renal Cell Carcinoma: A Clinicopathologic Study of 57 Separate Carcinomas in 18 Patients.". Am J Surg Pathol 38 (11): 1457-67. doi:10.1097/PAS.0000000000000248. PMID 25093518.
  3. Trpkov, K.; Abou-Ouf, H.; Hes, O.; Lopez, JI.; Nesi, G.; Comperat, E.; Sibony, M.; Osunkoya, AO. et al. (Oct 2017). "Eosinophilic Solid and Cystic Renal Cell Carcinoma (ESC RCC): Further Morphologic and Molecular Characterization of ESC RCC as a Distinct Entity.". Am J Surg Pathol 41 (10): 1299-1308. doi:10.1097/PAS.0000000000000838. PMID 28786877.
  4. Pivovarcikova K, Alaghehbandan R, Vanecek T, Ohashi R, Pitra T, Hes O (January 2022). "TSC/mTOR Pathway Mutation Associated Eosinophilic/Oncocytic Renal Neoplasms: A Heterogeneous Group of Tumors with Distinct Morphology, Immunohistochemical Profile, and Similar Genetic Background". Biomedicines 10 (2). doi:10.3390/biomedicines10020322. PMC 8869370. PMID 35203531. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8869370/.