A Study of Apalutamide Combined With GnRH Agonist in Participants With Androgen Receptor Positive Salivary Gland Carcinoma

The purpose of the study is to evaluate the overall response rate (ORR) of apalutamide in combination with a gonadotropin-releasing hormone (GnRH) agonist in participants with androgen receptor (AR) expressing locally advanced or recurrent/metastatic salivary gland carcinoma (SGC).

Inclusion Criteria: * Histologically confirmed salivary gland carcinoma (SGC) by local pathology * Androgen receptor (AR) expressing SGC: Local testing of AR-positivity will be performed as standard of care for the eligibility confirmation. AR-positivity will be defined according to immunohistochemistry (IHC) staining of tumor tissue with at least 1 percent (%) of cell nuclei staining positive. Tissue should be available for the central confirmation of AR-positivity, but the central result of AR positivity will not be required for initiating the study intervention * Locally advanced or recurrent/metastatic SGC * Measurable lesion(s) according to the Response Evaluation Criteria in Solid Tumors (RECIST) version 1.1 * Eastern Cooperative Oncology Group (ECOG) performance status 0, 1 or 2 Exclusion Criteria: * Treatment with any other investigational agent or participation in another clinical study with therapeutic intent within 30 days prior to first dose. Treatment with a drug that has a short half life (t1/2) (for example, less than \[\