Case Report

A rare case of TFE-related pigmented renal tumor with overlapping features between melanotic Xp11 translocation renal cancer and Xp11 renal cell carcinoma with melanotic features

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Corresponding Author

Leonardo Cardili

[email protected]

Department of Pathology, Escola Paulista de Medicina/Universidade Federal de São Paulo (EPM/UNIFESP), São Paulo, Brazil

Correspondence: Leonardo Cardili, MD, Department of Pathology, Escola Paulista de Medicina/Universidade Federal de São Paulo (EPM/UNIFESP), R. Botucatu, 740. Ed. Lemos Torres, 1° andar. Vila Mariana, São Paulo 04023-900, Brazil. E-mail: [email protected]

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Gregório Wrublevsky Pereira,

Gregório Wrublevsky Pereira

Instituto de Oncologia Pediátrica (IOP/GRAAC), São Paulo, Brazil

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Cristiano Ribeiro Viana,

Cristiano Ribeiro Viana

Department of Pathology, Hospital do Câncer de Barretos/Fundação Pio XII, Barretos, Brazil

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Leonardo Cardili,

Corresponding Author

Leonardo Cardili

[email protected]

Department of Pathology, Escola Paulista de Medicina/Universidade Federal de São Paulo (EPM/UNIFESP), São Paulo, Brazil

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Gregório Wrublevsky Pereira,

Gregório Wrublevsky Pereira

Instituto de Oncologia Pediátrica (IOP/GRAAC), São Paulo, Brazil

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Cristiano Ribeiro Viana,

Cristiano Ribeiro Viana

Department of Pathology, Hospital do Câncer de Barretos/Fundação Pio XII, Barretos, Brazil

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First published: 16 February 2017

https://doi.org/10.1111/pin.12517

Citations: 4

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Abstract

In recent years, an increasing number of TFE3 rearrangement-associated tumors with melanotic features have been reported as primary neoplasm in different anatomical sites, including the kidney. Melanotic Xp11 translocation renal cancer (MXTRC) and Xp11 renal cell carcinoma with melanotic features (XRCCM) have been proposed to be main categories for pigmented lesions in the microophthalmia-associated transcription factor (MiTF/TFE3) family of renal tumors that may show variable degrees of melanocytic differentiation. Herein we report a rare case of TFE3-related pigmented renal tumor showing unusual immunoexpression of cytokeratins (AE1/AE3) and renal cell carcinoma markers (RCC, CD10). Cathepsin-K and Vimentin were diffusely positive whereas melanocytic markers (HMB-45 and Melan-A) displayed weak and patchy expression. We found no labelling for PAX-8, muscle markers (desmin, smooth muscle actin, muscle-specific actin and caldesmon) and S-100. TFE3 fusion was confirmed by break-apart fluorescence in situ hybridization (FISH). This case corroborates previous evidence for overlap in the TFE3-associated cancer family and illustrates that it may not be possible to set a clear cutoff between epithelial (XRCCM) and mesenchymal (MXTRC) subgroups.

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Volume67, Issue4

April 2017

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A rare case of TFE-related pigmented renal tumor with overlapping features between melanotic Xp11 translocation renal cancer and Xp11 renal cell carcinoma with melanotic features

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A rare case of TFE-related pigmented renal tumor with overlapping features between melanotic Xp11 translocation renal cancer and Xp11 renal cell carcinoma with melanotic features

Correction(s) for this article

Corrigendum

Abstract

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