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Furthermore, the adverse reactions of the TMZ are relatively mild, which is why it is currently recommended as a first-line chemotherapy drug for refractory pituitary adenomas (RPAs) and pituitary carcinomas (PCs). Summary: Systematic evaluations indicate a radiological response rate of 41% and a hormonal response rate of 53%, underscoring TMZ clinical efficacy, particularly when combined with radiotherapy. Functional tumors demonstrate a higher response rate compared to nonfunctional tumors. While the optimal duration of TMZ treatment remains undetermined, studies suggest that longer therapy durations may lead to better prognoses. Additionally, prior to TMZ administration, it is advisable to conduct immunohistochemical analysis of O6-methylguanine-DNA methyltransferase, MSH2, MSH6, MLH1, PMS2, and N-methylpurine DNA glycosylase to assess the potential impact of repair mechanisms such as direct repair, mismatch repair pathway, and base excision repair on TMZ treatment. The efficacy of TMZ analogs, combined TMZ therapies, and TMZ with nanomaterials following TMZ treatment failure remains uncertain. Key Messages: The involvement of experienced multidisciplinary pituitary teams in all management decisions for RPAs\/PCs patients is essential. <\/jats:p>","DOI":"10.1159\/000543427","type":"journal-article","created":{"date-parts":[[2025,1,9]],"date-time":"2025-01-09T17:00:59Z","timestamp":1736442059000},"page":"335-350","source":"Crossref","is-referenced-by-count":3,"title":["Temozolomide Treatment in Refractory Pituitary Adenomas and Pituitary 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