The prognosis for Diffuse Intrinsic Pontine Glioma (DIPG) is very poor. This aggressive brain tumor primarily affects children and is known for its rapid progression and resistance to treatment. Key aspects of the prognosis for DIPG include:

1. **Median Survival Time**: The median survival time after diagnosis is approximately 9 to 12 months. This means that most children diagnosed with DIPG do not survive beyond a year.

2. **Five-Year Survival Rate**: The five-year survival rate for DIPG is less than 1%. This stark statistic highlights the urgent need for more effective treatments.

3. **Treatment Challenges**: The tumor’s location in the brainstem and its diffuse growth pattern make surgical removal impossible and limit the effectiveness of conventional treatments like chemotherapy and radiation therapy.

4. **Symptom Management**: While radiation therapy can temporarily relieve symptoms and improve quality of life, its effects are typically short-lived, with symptoms often returning within a few months.

5. **Research and Trials**: Despite ongoing research and clinical trials exploring new treatments, significant breakthroughs have yet to be achieved. Experimental therapies and precision medicine approaches are currently being investigated, but they are not yet standard practice.

6. **Support and Palliative Care**: Given the poor prognosis, palliative care and comprehensive support for the child and family are critical. This includes managing symptoms, providing psychological support, and enhancing the quality of life as much as possible.

Overall, DIPG remains one of the most challenging pediatric cancers, with ongoing efforts focused on better understanding the disease and developing more effective treatments to improve outcomes for affected children.