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paroxysmal hypertension :: Article Creator The Challenges Of Paroxysmal Nocturnal Hemoglobinuria Paroxysmal nocturnal hemoglobinuria (PNH) is a very rare disease. It's also very complex. If you or a loved one has recently been diagnosed with PNH, you may wonder what sort of challenges you will face. It's hard to know right away. Sometimes, people with PNH have few, if any, symptoms. Other times, they have many different symptoms and complications that dramatically impact their quality of life. Since PNH is so rare – there are only 1.3 new cases diagnosed per million people each year – your doctor may not know a lot about it, either. While it used to be thought that people with PNH only live on average of 15 to 20 years, research suggests that life expectancy has been increasing over the last 2 decades. Soon, PNH patients may have a life span similar to that of people without the condition. But it's important to be aware of the chal...