I'm so sorry to hear about your brother's lung cancer diagnosis. It's understandable that you're feeling scared and concerned, especially with young children involved. It's important to remember that each person's prognosis can vary based on various factors, such as the type and stage of lung cancer, health, and response to treatment.

Only your brother's healthcare team can provide you with specific information regarding his prognosis. I encourage you to reach out to them for a more detailed discussion. However, it's worth noting that advancements in cancer treatment have improved the prognosis for many patients. There are several treatment options available for lung cancer, including radiation therapy, chemotherapy, targeted therapy, and immunotherapy. The treatment plan will depend on the specific characteristics of the cancer and his overall health.

In the meantime, it's important to provide emotional support to your brother and his family. You can offer to be a listening ear, provide practical help, and research resources that may be beneficial for them. Communicating your love, concern, and willingness to help can go a long way, even if you are physically far away. Additionally, your brother's healthcare team can provide guidance and resources for support services available to him and his family.

Remember to take care of yourself during this time as well. It may be helpful to seek support from friends, family, and perhaps a therapist to navigate your own emotions using healthy coping strategies.