Inclusion Criteria:

- male patients, >/=18 years of age

- former smoker (smoked >/= 100 cigarettes in his lifetime and quit >12 months before
enrollment)

- locally advanced (stage IIIb), metastatic (stage IV) or recurrent squamous non-small
cell lung cancer

- prior platinum-based therapy for advanced NSCLC

- ECOG performance status 0-1

Exclusion Criteria:

- uncontrolled symptomatic central nervous system (CNS) metastases

- prior therapy against epidermal growth factor receptor (EGFR)

- >1 prior chemotherapy for advanced/metatstatic NSCLC

- radiotherapy <28 days prior to enrollment

- history of melanoma at any time, or another malignancy in the last 5 years except for
carcinoma in situ of the cervix, basal or squamous cell carcinoma of the skin, or
surgically cured malignant neoplasias with a disease-free interval of >5 years

- not fully treated eye inflammation or infection, or predisposing conditions