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Clinical activity of androgen deprivation therapy in patients with metastatic/relapsed androgen receptor–positive salivary gland cancers
Author(s) -
Locati Laura D.,
Perrone Federica,
Cortelazzi Barbara,
Lo Vullo Salvatore,
Bossi Paolo,
Dagrada Gianpaolo,
Quattrone Pasquale,
Bergamini Cristiana,
Potepan Paolo,
Civelli Enrico,
Fallai Carlo,
Pilotti Silvana,
Licitra Lisa
Publication year - 2016
Publication title -
head and neck
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.012
H-Index - 127
eISSN - 1097-0347
pISSN - 1043-3074
DOI - 10.1002/hed.23940
Subject(s) - androgen receptor , medicine , androgen , salivary gland , oncology , androgen deprivation therapy , endocrinology , cancer , hormone , prostate cancer
Background Androgen deprivation therapy has some clinical activity in selected salivary gland cancer histotypes, with androgen receptor expression. Methods We retrospectively analyzed patients with androgen receptor‐expressing recurrent/metastatic salivary gland cancer, treated with androgen deprivation therapy. Protein expression of androgen receptor and ErbB family members was investigated. Progression‐free survival (PFS) and overall survival (OS) were the main endpoints. Results Seventeen patients were identified. No significant toxicities were reported. Overall response rate was 64.7%; 3‐year PFS and 5‐year OS were 11.8% and 19.3%, respectively. Androgen receptor overexpression may be sustained by gain of chromosome X (58%) and TP53 mutation (44%). No association between response to androgen deprivation therapy and epidermal growth factor receptor (EGFR), human epidermal growth factor receptor (HER)2, HER3 expression, PIK3CA mutations, or phosphatase and tensin homolog ( PTEN ) deletion was identified. Conclusion We confirm the activity of androgen deprivation therapy in androgen receptor‐expressing recurrent/metastatic salivary gland cancers. The hypothesis that an androgen receptor increased gene copy number may represent a possible mechanism of primary resistance should be further investigated. © 2015 Wiley Periodicals, Inc. Head Neck 38: 724–731, 2016