English   español  
Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/180213
logo share SHARE logo core CORE   Add this article to your Mendeley library MendeleyBASE

Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL
Exportar a otros formatos:

Advanced sporadic renal epithelioid angiomyolipoma: case report of an extraordinary response to sirolimus linked to TSC2 mutation

AuthorsEspinosa, Marta; Roldán-Romero, Juan María; Durán, Ignacio; Álava, Enrique de ; Apellaniz-Ruiz, María; Cascón, Alberto; Garrigos, Carmen; Robledo, Mercedes; Rodriguez-Antona, Cristina
KeywordsRenal epithelioid angiomyolipoma
TSC2 mutation
mTOR pathway activation
Issue Date15-May-2018
PublisherBioMed Central
CitationBMC Cancer 18: 561 (2018)
Abstract[Background] Renal epithelioid angiomyolipomas (EAML) are rare tumors with aggressive behavior. EAML can be sporadic or develop within the tuberous sclerosis complex syndrome, where mutations of TSC1 or TSC2 genes (critical negative regulators of mTOR Complex 1) result in an increased activation of mTOR pathway. Optimal EAML treatment, including mTOR inhibitors, remains undetermined.
[Case presentation] Here we present the case of a young adult with a renal EAML that after radical nephrectomy developed metastases, first in liver and then in lumbar vertebrae. After complete surgical resection of these lesions, liver recurrence was detected, this time with incomplete surgical resection. After finding a new liver lesion, systemic treatment with sirolimus started. The patient exhibited a complete and durable response to this drug, being disease free at the time of publication, after 36 months of treatment. Targeted next generation sequencing (NGS) of MTOR, TSC1 and TSC2 genes in the primary tumor, metastasis and blood of the patient, revealed one inactivating TSC2 mutation (c.2739dup; p.K914*) in the tumor cells. Immunohistochemistry revealed decreased TSC2 protein content and increased phospho-S6 in the tumor cells, demonstrating mTOR pathway activation.
[Conclusion] NGS on an EAML patient with an extraordinary response to sirolimus uncovered TSC2 inactivation as the mechanism for the response. This study supports NGS as a useful tool to identify patients sensitive to mTOR inhibitors and supports the treatment of malignant EAML with these drugs.
Publisher version (URL)https://doi.org/10.1186/s12885-018-4467-6
Appears in Collections:(IBIS) Artículos
Files in This Item:
File Description SizeFormat 
epithelioid_angiomyolipoma.pdf1,14 MBAdobe PDFThumbnail
Show full item record
Review this work

Related articles:

WARNING: Items in Digital.CSIC are protected by copyright, with all rights reserved, unless otherwise indicated.