Definition: Hematoporphyrinuria is a condition in which a person's kidneys are unable to properly produce hemoglobin, an essential protein that carries oxygen throughout the body. This can lead to a variety of symptoms and complications, including jaundice (yellowing of the skin and eyes), jaundicosis (severe yellowing of the skin, especially on the face), and liver failure. The term "hematoporphyrinuria" is used in medical literature to describe this