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- W2171421812 abstract "Non-functioning pituitary adenomas are the most common pituitary macroadenomas in adults, accounting for approximately 14%-28% of all clinically relevant pituitary tumors. They are a heterogeneous group of tumors that cause symptoms by compression and/or hormone deficiencies. The possibility of tumor growth is increased in macroadenomas and solid tumors as compared to microadenomas and cystic tumors. Diagnosis is based on imaging procedures (magnetic resonance imaging), but there are studies reporting promising potential biomarkers. Transsphenoidal surgery remains the first therapeutic option for large tumors with compressive symptoms. There is no evidence that endoscopic procedures improve outcomes, but they decrease morbidity. There is no unanimity in finding prognostic predictors of recurrence. Radiosurgery achieves tumor control and, sometimes, adenoma size reduction. Its adverse effects increase with higher doses and tumor sizes>4cm(3). Drug treatment is of little value. In aggressive non-functioning tumors, temozolomide (TMZ) may be used with caution because no controlled studies are available. TMZ achieves tumor control in 38%-40% of aggressive non-functioning tumors. The optimal treatment regimen and duration have not been defined yet. Lack of response to TMZ after 3 cycles predicts for treatment resistance, but initial response does not ensure optimal mid or long-term results. O6-methylguanine-DNA methyltransferase expression has a limited predictive value of response to treatment with TMZ in aggressive non-functioning tumors. It should therefore not be a determinant factor in selection of patients to be treated with TMZ." @default.
- W2171421812 created "2016-06-24" @default.
- W2171421812 creator A5070947158 @default.
- W2171421812 date "2014-03-01" @default.
- W2171421812 modified "2023-09-23" @default.
- W2171421812 title "Tumores hipofisarios no funcionantes: actualización 2012" @default.
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- W2171421812 doi "https://doi.org/10.1016/j.endonu.2013.04.009" @default.