This study will evaluate the use of ZD1839 in the treatment of subjects with refractory germ cell tumors. Subjects will take ZD1839 for one year in the absence of excessive toxicity or decision to withdraw.

The primary objective is to determine the response rate of ZD1839 in patients with refractory germ cell tumors expressing EGFR. The secondary objectives are to determine the duration of response, time to progression and overall survival in patients with refractory germ cell tumors expressing EGFR and treated with ZD1839; to evaluate the tolerability of ZD1839 in patients with refractory germ cell tumors and to correlate tumor response to degree of EGFR expression by immunohistochemistry.

Inclusion Criteria:

• Histologic or serologic proof of metastatic germ cell neoplasm(gonadal or extragonadal primary) with disease not amenable to cure with either surgery or chemotherapy. Patients w/ seminoma and non-seminoma are eligible, as are women w/ ovarian germ cell tumors.
• Evidence of recurrent or metastatic carcinoma
• Must have received initial cisplatin combination therapy & demonstrated progression following the administration of at least one "salvage" regimen for advanced germ cell neoplasms.
• Patients are eligible after first line platinum bsed chemotherapy if their disease has relapsed and they have primary mediastinal non seminomatous germ cell tumor, late relapse or progressed w/in 4 wks of last platinum dose.
• immunohistochemical documentation of EGFR expression documented.
• adequate organ function: ANC >/=150,plt >100K, total bili \