How is your brother? What are the symptoms present? Can you elaborate on the x-ray result and the problem with his feet? If there is atelectasis or collapse of one lung, further evaluation may need to be done. If the doctor's diagnosis is pneumonia, this condition can be treated with antibiotics very well. The collapsed lung is usually treated and re-expanded also if the blockage of the airway has been removed. Discuss the management plan with his doctor to ease any worry. Take care and do keep us posted.