Tyrosine Kinase Inhibitors in Metastastic Adenoid Cystic Carcinoma

1. A patient with no measurable disease, or allergy to the EGFR TKIs 2. Prior chemotherapy, radiation therapy or surgery within 4 weeks prior to study entry except palliative radiotherapy to non-target lesions (within 2 weeks prior to study entry) 4. A patient with intestinal obstruction or impending obstruction, recent active upper GI bleeding 5. A pregnant or lactating patient 6. A patient of childbearing potential without being tested for pregnancy at baseline or with being tested for positive. (A postmenopausal woman with the amenorrhea period of at least 12 months or longer is considered to have non-childbearing potential) 7. A man or woman of childbearing potential who has no willingness to use a contraceptive measure during the study 9. A patient with history of uncontrolled seizures, central nervous system disorder or psychiatric disorders that are considered clinically significant by the investigator that would prohibit the understanding of informed consent or that may be considered to interfere with the compliance of the administration of the study medications.