MRCP2-3673

A 45-year-old smoker comes in with chest pain, cough, dyspnoea and haemoptysis. An X-ray shows circular shadows in the left upper lobe of the lung with involvement of the ipsilateral hilar node. A biopsy confirms the presence of small cell carcinoma. CT and PET scans do not indicate distant metastases, either on the opposite side of the chest or beyond the thoracic cavity.
What is the best course of treatment for this patient?