What we know about U.S. President Donald Trump's condition, how it is treated and what the letter from Trump's doctor said ...

President Donald Trump was recently diagnosed with chronic venous insufficiency, a medical condition that’s the result of damaged leg veins struggling to pump blood to the heart.

Penelope Vidal-Walsh, 10, had to have both her lower limbs and her right arm amputated after being diagnosed with meningitis.

The No Surprises Act has been a phenomenal success in taking on some unfair medical billing practices, but it wasn't a panacea.