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Long-term response to avelumab and management of oligoprogression in Merkel cell carcinoma:A case report

World Journal of Clinical Cases 2021年第18期9卷 4829-4836页

作者： Inês Leão Joana Marinho Telma Costa Department of Oncology Centro Hospitalar Vila Nova de Gaia/EspinhoVila Nova de Gaia 4434-502Portugal

BACKGROUND Merkel cell carcinoma(MCC)is a rare and aggressive cutaneous neuroendocrine neoplasia,with high risk of recurrence and metastasis and poor *** checkpoint inhibitors,like the anti-programmed death-ligand 1 agent avelumab,were recently approved for the treatment of advanced ***,herein,report the first case of advanced MCC with oligoprogression managed with avelumab and local radical *** SUMMARY A 61-year-old man was presented to the hospital with sporadic fever and an exudative malodorous mass(10 cm of diameter),located on the right gluteal *** final diagnosis was MCC,cT4N3M1c(AJCC,TNM staging 8th edition,2017),with invasion of adjacent muscle,in-transit metastasis,and bone *** started chemotherapy(cisplatin and etoposide),and after six cycles,the main tumor increased,evidencing disease *** months later,the patient started second line treatment with avelumab(under an early access program).After two cycles of treatment,the lesion started to decrease,achieving a major *** progression was documented after 16 ***,as the tumor became resectable,salvage surgery was performed,while keeping the systemic treatment with *** the patient developed bilateral pneumonia,immunotherapy was *** than 2.5 years after surgery(last 19 mo without systemic therapy),the patient maintains complete local response and stable bone *** This report highlights the efficacy and long-term response of avelumab on the management of a chemotherapy resistant advanced MCC,with evidence of oligoprogression,in combination with local radical treatment.

关键词： Merkel cell carcinoma Unresectable tumor Avelumab oligoprogression Surgery Chemotherapy Case report

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