Lapatinib and WBRT for Patients With Brain Metastases From Lung or Breast Tumors

Patients with breast or lung cancer who have developed brain metastases will be treated with WBRT (30Gy in 10 fractions) and lapatinib 1250mg once daily, followed by lapatinib treatment 1500mg once daily for a total duration of 6 weeks. At the 6 weeks timepoint, radiological assessment with brain MRI will take place to evaluate the response of the patients. Subsequent to the 6 weeks treatment period with lapatinib, the patients may discontinue lapatinib as monotherapy and the physicians can proceed with any therapy, according to their discretion. The patients will be followed-up every 12 weeks for disease progression and survival.